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1

Digitale Medien

Computer Simulations of Diffraction Effects due to Stacking Faults in β-SiC: I, Simulation Results (1997)

Pujar, Vijay V. ; Cawley, James D.

Oxford, UK : Blackwell Publishing Ltd

Journal of the American Ceramic Society 80 (1997), S. 0

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ISSN: 1551-2916

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Maschinenbau , Physik

Notizen: X-ray diffraction (XRD) patterns from nominally β-SiC specimens often differ from those expected for the cubic crystal structure. These differences include the presence of additional peaks, enhanced background intensities, peak broadening, changes in relative peak heights, and shifts in peak positions. It has long been recognized that they are due to the presence of stacking faults, and models relating the experimental observations to stacking fault population have continued to evolve. The presence and relative magnitude of these features vary among different β-SiC specimens. In this work, computer simulations were used to show that the variations are closely related to differences in the type and spatial distribution of stacking faults in each specimen. In these simulations, stacking sequences were generated using a selectively activated 1-D Ising model with a Boltzmann-type probability function for specifying errors, which allows a wide variety of fault configurations to be generated. Direct correlations between different features in the XRD data to the underlying fault population are demonstrated, which are discussed in this paper. It is also shown that this computer model is general, in the sense that many of the models presented in prior work can be interpreted as limiting cases of it.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1151-2916.1997.tb03034.x

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2

Digitale Medien

Nature of the Interaction and Photophysical Properties of [Mo6Cli8(SO3CF3)a6]2- and [Mo6Cli8Cla6]2- on Silica Gel (1995)

Robinson, L. M. ; Lu, H. ; Hupp, J. T. ; [weitere]

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 43-49

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ISSN: 1520-5002

Quelle: ACS Legacy Archives

Thema: Chemie und Pharmazie , Maschinenbau

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/cm00049a009

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3

Digitale Medien

Synthesis and ionic conductivity of a new series of modified Aurivillius phases (1995)

Kendall, Kurt R. ; Thomas, Julie K. ; Loye, Hans-Conrad

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 50-57

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ISSN: 1520-5002

Quelle: ACS Legacy Archives

Thema: Chemie und Pharmazie , Maschinenbau

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/cm00049a010

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4

Digitale Medien

Synthesis and Characterization of Polyaniline Derivatives: Poly(2-alkoxyanilines) and Poly(2,5-dialkoxyanilines) (1995)

D'Aprano, Giuseppe ; Leclerc, Mario ; Zotti, Gianni ; [weitere]

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 33-42

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ISSN: 1520-5002

Quelle: ACS Legacy Archives

Thema: Chemie und Pharmazie , Maschinenbau

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/cm00049a008

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5

Digitale Medien

Vibrational studies of molecular organization in evaporated phthalocyanine thin solid films (1995)

Aroca, R. ; Thedchanamoorthy, A.

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 69-74

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ISSN: 1520-5002

Quelle: ACS Legacy Archives

Thema: Chemie und Pharmazie , Maschinenbau

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/cm00049a012

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6

Digitale Medien

Poly(3,4-ethylenedithiathiophene). A New Soluble Conductive Polythiophene Derivative (1995)

Wang, Chenggang ; Schindler, Jon L. ; Kannewurf, Carl R. ; [weitere]

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 58-68

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ISSN: 1520-5002

Quelle: ACS Legacy Archives

Thema: Chemie und Pharmazie , Maschinenbau

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/cm00049a011

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7

Digitale Medien

Synthesis and processing of barium titanate ceramics from alkoxide solutions and monolithic gels (1995)

Frey, Matthew H. ; Payne, David A.

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 123-129

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ISSN: 1520-5002

Quelle: ACS Legacy Archives

Thema: Chemie und Pharmazie , Maschinenbau

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/cm00049a019

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8

Digitale Medien

Preparation and Characterization of Polypyrrole-Tin(IV) Oxide Nanocomposite Colloids (1995)

Maeda, Shuichi ; Ames, Steven P.

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 171-178

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ISSN: 1520-5002

Quelle: ACS Legacy Archives

Thema: Chemie und Pharmazie , Maschinenbau

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/cm00049a026

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9

Digitale Medien

Delocalized .pi.-Stacks Formed on Dendrimers (1995)

Miller, Larry L. ; Hashimoto, Toshihiro ; Tabakovic, Ibro ; [weitere]

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 9-11

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ISSN: 1520-5002

Quelle: ACS Legacy Archives

Thema: Chemie und Pharmazie , Maschinenbau

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/cm00049a003

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10

Digitale Medien

Thermodynamics of the Hydrothermal Synthesis of Calcium Titanate with Reference to Other Alkaline-Earth Titanates (1995)

Lencka, Malgorzata M. ; Riman, Richard E.

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 18-25

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ISSN: 1520-5002

Quelle: ACS Legacy Archives

Thema: Chemie und Pharmazie , Maschinenbau

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/cm00049a006

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11

Digitale Medien

Molecular Routes for the Synthesis of Metal Carbides, Nitrides, and Oxides. 1. Studies of the Thermal Decomposition of M2(OR)6 and M2(CH2Ph)2(OR)4 Compounds Where M = Mo and W (1995)

Baxter, David V. ; Chisholm, Malcolm H. ; DiStasi, Vincent F. ; [weitere]

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 84-92

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ISSN: 1520-5002

Quelle: ACS Legacy Archives

Thema: Chemie und Pharmazie , Maschinenbau

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/cm00049a014

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12

Digitale Medien

Preparation and Characterization of Pillared Gallium Aluminum Clays with Enriched Pillars (1995)

Tang, Xiaozhong ; Xu, Wen-Qing ; Shen, Yan-Fei ; [weitere]

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 102-110

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ISSN: 1520-5002

Quelle: ACS Legacy Archives

Thema: Chemie und Pharmazie , Maschinenbau

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/cm00049a016

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13

Digitale Medien

Preparation of Amorphous Boron Nitride from the Reaction of Haloborazines with Alkali Metals and Formation of a Novel Tubular Morphology by Thermal Annealing (1995)

Hamilton, Ewan J. M. ; Dolan, Shawn E. ; Mann, Charles M. ; [weitere]

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 111-117

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ISSN: 1520-5002

Quelle: ACS Legacy Archives

Thema: Chemie und Pharmazie , Maschinenbau

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/cm00049a017

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14

Digitale Medien

Thin Sol-Gel Silica Films on (3-Mercaptopropyl)trimethoxysilane-Modified Ag and Au Surfaces (1995)

Thompson, Wade R. ; Pemberton, Jeanne E.

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 130-136

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ISSN: 1520-5002

Quelle: ACS Legacy Archives

Thema: Chemie und Pharmazie , Maschinenbau

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/cm00049a020

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15

Digitale Medien

Alkali Metal Ions Insertion/Extraction Reactions with Hollandite-Type Manganese Oxide in the Aqueous Phase (1995)

Feng, Qi ; Kanoh, Hirofumi ; Miyai, Yoshitaka ; [weitere]

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 148-153

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ISSN: 1520-5002

Quelle: ACS Legacy Archives

Thema: Chemie und Pharmazie , Maschinenbau

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/cm00049a023

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16

Digitale Medien

Hydrothermal Synthesis of (Ph4P)2[Hg2As4S9] and (Me4N)[HgAs3S6]. Extended Chains and Layers Based on the Condensation of [AsS3]3- Units (1995)

Chou, Jun-Hong ; Kanatzidis, Mercouri G.

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 5-8

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ISSN: 1520-5002

Quelle: ACS Legacy Archives

Thema: Chemie und Pharmazie , Maschinenbau

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/cm00049a002

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17

Digitale Medien

Hydrogen Permeation Characteristics for Oxide/Metal Multilayered Films (1995)

Sakaguchi, Hiroki ; Shirai, Hiroo ; Tanaka, Hidenori ; [weitere]

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 137-141

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ISSN: 1520-5002

Quelle: ACS Legacy Archives

Thema: Chemie und Pharmazie , Maschinenbau

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/cm00049a021

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18

Digitale Medien

Surface Grafting of Functional Polymers to Macroporous Poly(trimethylolpropane trimethacrylate) (1995)

Dhal, Pradeep K. ; Vidyasankar, S. ; Arnold, Frances H.

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 154-162

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ISSN: 1520-5002

Quelle: ACS Legacy Archives

Thema: Chemie und Pharmazie , Maschinenbau

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/cm00049a024

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19

Digitale Medien

THE BOUSSINESQ WEDGE AND THE Jk, L AND M INTEGRALS (1997)

Seed, G. M.

Oxford, UK : Blackwell Publishing Ltd

Fatigue & fracture of engineering materials & structures 20 (1997), S. 0

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ISSN: 1460-2695

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Maschinenbau

Notizen: Abstract— This paper examines the application of the Jk, L and M integrals, in complex-variable form, to the Boussinesq wedge. The wedge is symmetrical and subjected to a point couple and point forces at the apex of the wedge. In the case of a point couple acting at the wedge apex the Jy, L and M integrals are found to vanish for all wedge angles whereas Jx displays a 1/r3 path-dependence; where r is a radial dimension measured from the wedge apex. When the wedge is subjected to point forces at the wedge apex then Jx and Jy are 1/r path-dependent whereas L and M are path-independent.The property that the L and M integrals are path-independent for the Boussinesq wedge is applied to the problem of determining the modes I and II stress intensity factors for a corner-loaded edge crack in a half-plane subjected to both normal and parallel point forces to the free surface of the half-plane.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1460-2695.1997.tb01534.x

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20

Digitale Medien

A STUDY ON FATIGUE CRACK GROWTH UNDER OUT-OF-PHASE COMBINED LOADINGS (1997)

Ohkawa, I. ; Takahashi, H. ; Moriwaki, M. ; [weitere]

Oxford, UK : Blackwell Publishing Ltd

Fatigue & fracture of engineering materials & structures 20 (1997), S. 0

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ISSN: 1460-2695

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Maschinenbau

Notizen: Abstract— Fatigue tests were performed on thin-walled tubular specimens of S45C steel under tension-compression, pure torsion, in-phase and out-of-phase axial-torsional loadings. The relationship between cracking behaviour and stress components on the crack plane was investigated. Measurement of microcrack density showed that microcracking was governed predominantly by the shear stress amplitude acting on the crack plane for all loading conditions. The failure crack was formed by coalescence of many cracks initiated near the maximum shear planes. The cracks grew turning their orientation to the direction perpendicular to the maximum normal stress. The transition of crack orientation occurred at relatively longer crack lengths at a higher stress ratio. The crack growth behaviour for all loading modes can be correlated using an equivalent strain intensity parameter based on shear and normal strains on the crack plane.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1460-2695.1997.tb01536.x

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21

Digitale Medien

ANALYSIS AND MODELISATION OF SHORT CRACK GROWTH BY DUCTILE FRACTURE MICROMECHANISMS (1997)

Betegon, C. ; Rodriguez, C. ; Belzunce, F. J.

Oxford, UK : Blackwell Publishing Ltd

Fatigue & fracture of engineering materials & structures 20 (1997), S. 0

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ISSN: 1460-2695

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Maschinenbau

Notizen: Abstract— A ductile medium strength steel has been modelled by means of the Gurson model, and been used to investigate the effect of crack tip constraint in several fracture mechanics specimens. Both numerical and experimental results have been obtained, in the course of the crack extension process, for single edge notch bending specimens with different crack length-to-width ratios. The geometries with the shorter cracks always exhibited higher J values at initiation and steeper J crack growth resistance curves, and these results have been explained in terms of the stress and strain fields and damage development in the region ahead of the crack tip.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1460-2695.1997.tb00297.x

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22

Digitale Medien

LOW-TEMPERATURE AUTOFRETTAGE: AN IMPROVED TECHNIQUE TO ENHANCE THE FATIGUE RESISTANCE OF THICK-WALLED TUBES AGAINST PULSATING INTERNAL PRESSURE (1997)

Mughrabi, H. ; Donth, B. ; Vetter, G.

Oxford, UK : Blackwell Publishing Ltd

Fatigue & fracture of engineering materials & structures 20 (1997), S. 0

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ISSN: 1460-2695

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Maschinenbau

Notizen: Abstract— It is shown that autofrettage at low temperatures is superior to autofrettage at room temperature in enhancing the fatigue resistance of thick-walled tubes against pulsating internal pressure. The physical reason is based on the well-known temperature dependence of the mechanical behaviour of metals and alloys which generally exhibit an enhancement of both the yield stress and strain hardening behaviour at lower temperatures. As a consequence, significantly larger compressive residual hoop stresses can be introduced during pressurization at low temperatures than at room temperature. Experimental data obtained on thick-walled tubes of the metastable austenitic stainless steel AISI 304 L which were subjected to pulsating internal pressure at room temperature after autofrettage at temperatures between-110°C and room temperature are presented. These data demonstrate convincingly the advantages offered by low-temperature autofrettage in enhancing both the fatigue life in the finite-life region and the fatigue endurance limit in comparison with autofrettage at room temperature. In conclusion, some specific materials requirements for optimum low-temperature autofrettage performance are discussed.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1460-2695.1997.tb00291.x

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23

Digitale Medien

APPLICATION OF A NORMALIZATION METHOD FOR DETERMINING J-R CURVES IN GLASSY POLYMER PVC AT DIFFERENT CROSSHEAD SPEEDS (1997)

Che, M. ; Grellmann, W. ; Seidler, S. ; [weitere]

Oxford, UK : Blackwell Publishing Ltd

Fatigue & fracture of engineering materials & structures 20 (1997), S. 0

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ISSN: 1460-2695

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Maschinenbau

Notizen: Abstract— A new single-specimen testing method, the normalization method with the so-called LMN calibration function, based on the load separation principle and function calibrations from an individual test record, was used to construct J-R curves directly from load versus load-line displacement records without any additional on-line crack-length monitoring equipment. The research was done on CT-specimens of a glassy polymer PVC at different crosshead speeds ranging from 0.01 to 50 mm/min. The J-R curves evaluated from the normalization method are in good agreement with those from the conventional multiple-specimen testing method in the whole range of the tested crosshead speeds. The results demonstrated the applicability of the normalization method for developing J-R curves at different crosshead speeds in PVC. The crack initiation J-integral values, J0.2, showed a two-regime dependence on the crosshead speeds in the tested crosshead speed range.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1460-2695.1997.tb00272.x

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24

Digitale Medien

EFFECT OF BIAXIAL MEAN STRESS ON CYCLIC STRESS-STRAIN RESPONSE AND BEHAVIOUR OF SHORT FATIGUE CRACKS IN A HIGH STRENGTH SPRING STEEL (1997)

Zhang, W. ; Akid, R.

Oxford, UK : Blackwell Publishing Ltd

Fatigue & fracture of engineering materials & structures 20 (1997), S. 0

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ISSN: 1460-2695

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Maschinenbau

Notizen: Abstract— Biaxial fatigue tests were conducted on a high strength spring steel using hour-glass shaped smooth specimens. Four types of loading system were employed, i.e. (a) fully reversed cyclic torsion, (b) uniaxial push—pull, (c) fully reversed torsion with a superimposed axial static tension or compression stress, and (d) uniaxial push—pull with a superimposed static torque, to evaluate the effects of mean stress on the cyclic stress—strain response and short fatigue crack growth behaviour. Experimental results indicate that a biaxial mean stress has no apparent influence on the stress—strain response in torsion, however a superimposed tensile mean stress was detrimental to torsional fatigue strength. Similarly a superimposed static shear stress reduced the push—pull fatigue lifetime. A compressive mean stress was seen to be beneficial to torsion fatigue life. The role of mean stress on fatigue lifetime, under mixed mode loading, was investigated through experimental observations and theoretical analyses of short crack initiation and propagation. Using a plastic replication technique the effects of biaxial mean stress on both Stage I (mode II) and Stage II (mode I) short cracks were evaluated and analysed in detail. A two stage biaxial short fatigue crack growth model incorporating the influence of mean stress was subsequently developed and applied to correlate data of crack growth rate and fatigue life.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1460-2695.1997.tb00276.x

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25

Digitale Medien

CRACK INITIATION MECHANISMS IN TORSIONAL FATIGUE (1997)

Doquet, V.

Oxford, UK : Blackwell Publishing Ltd

Fatigue & fracture of engineering materials & structures 20 (1997), S. 0

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ISSN: 1460-2695

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Maschinenbau

Notizen: Abstract— The development of fatigue damage in Co45Ni specimens during push—pull and reversed torsion tests, performed inside a scanning electron microscope, was observed and the different stress states compared. It appeared that transgranular crack initiation and development is delayed and intergranular crack initiation promoted under torsional loading. This was explained in terms of reduced surface distortion at the emergence of persistent slip bands (PSBs) and smaller compatibility stresses at the PSB-matrix interfaces. The influence of the mechanical strength of grain boundaries on the difference between tensile and torsional fatigue lives is discussed.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1460-2695.1997.tb00280.x

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26

Digitale Medien

STRESS INTENSITY FACTORS AND WEIGHT FUNCTIONS FOR SEMI-ELLIPTICAL SURFACE CRACKS IN FINITE-THICKNESS PLATES UNDER TWO-DIMENSIONAL STRESS DISTRIBUTION (1997)

Wang, X. ; Lambert, S. B.

Oxford, UK : Blackwell Publishing Ltd

Fatigue & fracture of engineering materials & structures 20 (1997), S. 0

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ISSN: 1460-2695

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Maschinenbau

Notizen: Abstract— A Fourier series approach is proposed to calculate stress intensity factors using weight functions for semi-elliptical surface cracks in flat plates subjected to two-dimensional stress distributions. The weight functions were derived from reference stress intensity factors obtained by three-dimensional finite element analyses. The close form weight functions derived are suitable for the calculation of stress intensity factors for semi-elliptical surface cracks in flat plates under two-dimensional stress distributions with the crack aspect ratio in the range of 0.1 ≤a/c≤ 1 and relative depth in the range of 0 ≤a/t≤ 0.8. Solutions were verified using several two-dimensional non-linear stress distributions; the maximum difference being 6%.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1460-2695.1997.tb01517.x

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27

Digitale Medien

AN IMPROVED PROCEDURE FOR THE DETERMINATION OF HOT SPOT STRESSES IN TUBULAR JOINTS (1997)

Soh, A. K.

Oxford, UK : Blackwell Publishing Ltd

Fatigue & fracture of engineering materials & structures 20 (1997), S. 0

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ISSN: 1460-2695

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Maschinenbau

Notizen: Abstract— A conventional finite element method may show a weakness when determining the hot spot stress distributions in the brace/chord intersection region of offshore tubular joints. This is because the chosen element displacement functions do not implicitly satisfy the conditions which prevail on the free surfaces. A procedure has been proposed to modify the conventional finite element method so as to allow the hot spot stresses, which occur at the free boundary of the weld toe of tubular joints, to be determined with improved accuracy. The results obtained by this modified method are compared with both an experimental and a traditional finite element solution. The comparison shows that the modified solution is in better agreement with the experimental data as compared with the traditional solution.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1460-2695.1997.tb01523.x

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INFORMATION ON CONFERENCES/SEMINARS (1997)

Oxford, UK : Blackwell Publishing Ltd

Fatigue & fracture of engineering materials & structures 20 (1997), S. 0

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ISSN: 1460-2695

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Maschinenbau

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1460-2695.1997.tb01504.x

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A SIMPLE TEST METHOD FOR ENERGY DISSIPATION RATE, CTOA AND THE STUDY OF SIZE AND TRANSFERABILITY EFFECTS FOR LARGE AMOUNTS OF DUCTILE CRACK GROWTH (1997)

Turner, C. E. ; Kolednik, O.

Oxford, UK : Blackwell Publishing Ltd

Fatigue & fracture of engineering materials & structures 20 (1997), S. 0

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Quelle: Blackwell Publishing Journal Backfiles 1879-2005

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Notizen: Abstract— Simple extensions to the standard deep notch bend test procedure are suggested to allow the collection of data relevant to the energy dissipation rate, D, crack opening angle, COA, and J, all for arbitrarily large amounts of growth in extensive plasticity. The methods of analysis are detailed for real elastic-plastic behaviour of a high strength low-hardening type metal with a view to encouraging use on a wider range of materials. A proposal is made, and equations given, that the particular version of J used for an R-curve derived from the area under the loading diagram, should correspond to the value of the far-field integral, Jff.The relationship between the global measure of COA that emerges from D and the local crack tip opening angle, CTOA, as used in computational studies, is established. Transferability of CTOA data is examined in the light of effects of size and configuration. An explicit rule of the form CTOA √G =f (material and configuration) is proposed for the modelling of ductile growth in finite element studies. It is applied to a set of data in the literature, for the variation of CTOA with size in the deep notch bend test and for the configurations, bending, double edge and centre cracked tension.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1460-2695.1997.tb01507.x

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Digitale Medien

THE ELECTRON CHANNELLING CONTRAST TECHNIQUE APPLIED TO THE CHARACTERISATION OF DISLOCATION STRUCTURES IN THE VICINITY OF A FATIGUE CRACK (1997)

Chen, D. L. ; Melisova, D. ; Weiss, B. ; [weitere]

Oxford, UK : Blackwell Publishing Ltd

Fatigue & fracture of engineering materials & structures 20 (1997), S. 0

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Quelle: Blackwell Publishing Journal Backfiles 1879-2005

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Notizen: Abstract— In this investigation the Electron Channelling Contrast (ECC) technique in scanning electron microscopy (SEM) was applied to reveal the dislocation structures in the vicinity of surface fatigue cracks in comparison to those of cyclically-deformed recrystallized polycrystalline copper. The plastic zone around a fatigue crack was found to consist of an innermost region containing cells, followed by a region containing dense veins and PSBs, surrounded by a structure of loose veins, bundles and loop patches typical of the cyclically deformed matrix. A relation between plastic strain amplitude values deduced from cyclic stress-strain investigations and the dislocation structures near fatigue cracks are given. Typical regions of damage accumulation were identified and plastic strain contours for surface fatigue cracks established. The essentially non-destructive ECC technique is particularly suited to identify the changes in mesoscopic dislocation structures from surface layers to the interior of specimens over large specimen areas.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1460-2695.1997.tb01510.x

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Digitale Medien

INFORMATION ON CONFERENCES/SEMINARS (1997)

Oxford, UK : Blackwell Publishing Ltd

Fatigue & fracture of engineering materials & structures 20 (1997), S. 0

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ISSN: 1460-2695

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Maschinenbau

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1460-2695.1997.tb01494.x

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Digitale Medien

PREDICTION OF THE FATIGUE LIMIT OF CRACKED SPECIMENS BASED ON THE CYCLIC R-CURVE METHOD (1997)

Akiniwa, Y. ; Zhang, L. M. ; Tanaka, K.

Oxford, UK : Blackwell Publishing Ltd

Fatigue & fracture of engineering materials & structures 20 (1997), S. 0

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Quelle: Blackwell Publishing Journal Backfiles 1879-2005

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Notizen: Abstract— The propagation behaviour of fatigue cracks emanating from pre-cracks was numerically simulated to evaluate the development of crack closure with crack growth. The crack opening stress intensity factor at the threshold was approximated as a function of the applied stress and the amount of crack extension. Pre-cracked specimens of a medium-carbon steel with a small surface crack and a single-edge crack were fatigued to investigate experimentally the initiation and propagation of cracks from pre-cracks. Crack closure was dynamically measured by using an interferometric strain/displacement gauge. The threshold condition of crack initiation from pre-cracks was given by a constant value of the effective stress intensity range which was equal to the threshold value for long cracks. The cyclic R-curve was constructed in terms of the threshold value of the maximum stress intensity factor as a function of crack extension approximated on the basis of the experimental and numerical results. The cyclic R-curve method was used to predict the fatigue thresholds of pre-cracked specimens. The predicted values of the fatigue limits for crack initiation and fracture, and the length of non-propagating cracks agreed very well with the experimental results.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1460-2695.1997.tb01497.x

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Digitale Medien

THREE-DIMENSIONAL CRACK-SHAPE EFFECTS DURING THE GROWTH OF SMALL SURFACE FATIGUE CRACKS IN A TITANIUM-BASE ALLOY (1997)

Ravichandran, K. S.

Oxford, UK : Blackwell Publishing Ltd

Fatigue & fracture of engineering materials & structures 20 (1997), S. 0

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Notizen: Abstract— A basic study was performed on the evolution of three-dimensional shapes of small surface fatigue cracks during fatigue, and the effect of this evolution on small-crack growth behavior of a titanium-base alloy. Specifically, the nature and the magnitude of variations in crack aspect ratio, a/c (a is the crack depth and c is the half-surface crack length), during cyclic crack growth and its impact on growth rates have been studied. Experiments were performed on naturally initiated micro-cracks in a microstructure consisting of equiaxed primary-α2 phase in a Widmanstätten (transformed β) matrix. Several cracks under stress ratio (R) levels of 0.1 and −1, were studied. A specialized experimental system, consisting of a laser interferometer (to measure precisely the small-crack surface displacements), and a photo microscope (to automatically and continuously photograph the fatigue micro-cracks) was employed in the study. Apparent aspect ratios of surface cracks were calculated from the compliance response and the surface crack length data as a function of fatigue cycles. These data enabled accurate calculations of growth rates at the surface crack tip as well as the tip at depth in the bulk over the entire crack growth period, thus giving an insight into the crack growth process. Measurements of closure levels of small cracks were also performed and were used to partly account for the differences in growth rates. In the comparisons of small-crack growth data with the large-crack data, surface growth rates correlated relatively well with the large-crack data. Growth rates at depth exhibited large variations due to the irregularity of crack fronts at this location, and these rates deviated significantly from the large-crack behavior. Additionally, these growth rates varied between different cracks. An attempt was made to rationalize these observations in terms of the effects of inhomogeneities present in the microstructure.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1460-2695.1997.tb01500.x

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Digitale Medien

PREDICTION OF FATIGUE FAILURE IN A CRANKSHAFT USING THE TECHNIQUE OF CRACK MODELLING (1997)

Taylor, D. ; Ciepalowicz, A. J. ; Rogers, P. ; [weitere]

Oxford, UK : Blackwell Publishing Ltd

Fatigue & fracture of engineering materials & structures 20 (1997), S. 0

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ISSN: 1460-2695

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Maschinenbau

Notizen: Abstract— A new technique, known as crack modelling, is used here to predict fatigue failure in a crankshaft component. The technique uses a linear elastic finite element (FE) analysis to derive a stress intensity factor (K) for the component under load. The novel feature of the technique is that K is calculated without introducing a crack into a component; the stress field around the maximum stress point is examined and compared to that for a standard centre-cracked plate. The fatigue limit for a crankshaft was successfully predicted, when compared to experimental data. The only material parameter required for this prediction was the threshold stress intensity range, ΔKth.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1460-2695.1997.tb00397.x

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Digitale Medien

EFFECTS OF DRAWING STRAIN AND BLUING ON THE FATIGUE STRENGTH OF EUTECTOID STEEL WIRES (1997)

Katagiri, K. ; Sato, T. ; Shin, H. S. ; [weitere]

Oxford, UK : Blackwell Publishing Ltd

Fatigue & fracture of engineering materials & structures 20 (1997), S. 0

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ISSN: 1460-2695

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Maschinenbau

Notizen: Abstract— The effects of bluing, associated with drawing strain, on the fatigue strength of eutectoid steel wires have been investigated. The fatigue limit increases by bluing and the increase is more significant with higher drawing strain. The peak in the fatigue limit with regard to the drawing strain in the wires, at a strain of 2.5, disappears after bluing. On the other hand, in the ferritic steel wires investigated for comparison, the fatigue limit gradually increases with the drawing strain up to 7.7. Furthermore, no appreciable change in the fatigue limit due to bluing is found. Based on the results of hardness tests on fatigue specimens with- and without-bluing, it is deduced that the decrease of the fatigue limit beyond the peak drawing strain in the eutectoid steel wire can partly be attributed to insufficient locking of the high-density dislocations by solute atoms. The effect of relaxation of residual stress during bluing is also briefly discussed.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1460-2695.1997.tb01520.x

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Digitale Medien

LIMITATIONS ON THE USE OF THE STRESS INTENSITY FACTOR, K, AS A FRACTURE PARAMETER IN THE FATIGUE PROPAGATION OF SHORT CRACKS (1997)

Kfouri, A. P.

Oxford, UK : Blackwell Publishing Ltd

Fatigue & fracture of engineering materials & structures 20 (1997), S. 0

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Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Maschinenbau

Notizen: Abstract— It is well known that for very short cracks the stress intensity factor K is not a suitable parameter to estimate the stress level over the small but finite Stage II process zone activation region of size rs near the crack tip, within which crack growth events take place. A critical appreciation of the reasons for the limitations on the applicability of ΔK as a fatigue crack propagation (FCP) parameter, when the crack length a is of the same order of magnitude or smaller than the size of the ‘fatigue-fracture activation region’, rs is presented. As an alternative to ΔK the range Δσs of the cyclic normal stress at a point situated at the fixed distance s=rs/2, ahead of the crack tip, inside the fatigue-fracture activation region, is proposed. It is observed that the limitation on the use of ΔK when the crack is short, is mathematical (and not physical) but this inconvenience is easily circumvented if the stress Δσs at the prescribed distance is used instead of ΔK since nowadays Δσs can be obtained numerically by using finite element methods (FEM). It follows that the parameter Δσs is not restricted by the mathematical limitations on ΔK and so it would seem that there is, a priori, no reason why the validity of the parameter Δσs cannot be extended to short cracks. It is shown that if the Paris law is expressed in terms of Δσs (πrrs)½ instead of ΔK the validity of the modified Paris law can be extended to short cracks.A coherent estimate of the value of the fatigue-fracture activation region rs is derived in terms of the fatigue limit ΔσFL obtained from S-N tests and of the threshold value ΔKth obtained from tests on long cracks where both relate to Stage II crack growth that ends in failure, namely, rs= (ΔKth/ΔσFL)2/π. An overall, threshold diagram is presented based on the simple criterion that, for sustained Stage II FCP, Δσs must be greater than ΔσFL. The study is based on a simple continuum mechanics approach and its purpose is the investigation of the suitability of both ΔK and Δσs to characterise the crack driving force that activates complex fracture processes at the microstructure's scale. The investigation pertains to conditions that lead to the ultimate failure of the component at values of Δσs 〉 ΔσFL.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1460-2695.1997.tb01521.x

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A SINGULAR INTEGRAL EQUATION SOLUTION FOR THE LINEAR ELASTIC CRACK OPENING DISPLACEMENT OF AN ARBITRARILY SHAPED PLANE CRACK: PART II REGULAR INTEGRAL SOLUTIONS (1997)

Mayrhofer, K. ; Fischer, F. D.

Oxford, UK : Blackwell Publishing Ltd

Fatigue & fracture of engineering materials & structures 20 (1997), S. 0

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Quelle: Blackwell Publishing Journal Backfiles 1879-2005

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Notizen: Abstract— The boundary value problem for an arbitrarily shaped plane crack embedded in a 3D linear elastic solid can be reduced to a governing hyper-singular integral equation. A discretizing procedure based on a triangulation of the crack area has been offered in Part I of this work. The main goal of Part I is to introduce the analytical results for the 18 resulting finite-part integrals defined over a triangular mesh area. The finite-part integrals occur in those triangles where the source point coincides with one of the element nodes. Mostly the source point lies outside of the considered triangle. In these cases the occurring area integrals are regular.The aim of Part II is, therefore, the derivation of the closed form expressions for the relevant 18 regular area integrals. The resulting relations are of algebraic form which can easily be coded in compact form. Their numerical proof by two different methods shows the highest accuracy and, therefore, the correctness of the final solutions. The relevant numerical results are offered in Appendix I.With the formulae provided in Part I and Part II of the paper the determination of the coefficient matrix, necessary for the calculation of COD values from a linear equation system, is precise and needs only minimum computer time.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1460-2695.1997.tb01506.x

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Digitale Medien

SUBINTERFACIAL FRACTURE IN FERRITE-AUSTENITE JOINTS UNDER MODE—III LOADING (1997)

Zelezny, M. F. ; Tschegg, E. K. ; Kirchner, H. O. K.

Oxford, UK : Blackwell Publishing Ltd

Fatigue & fracture of engineering materials & structures 20 (1997), S. 0

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Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Maschinenbau

Notizen: Abstract— Circumferentially notched cylindrical specimens are tested in torsion to obtain critical J values from crack resistance curves. The specimens are explosion cladded, half ferrite, half austenite, with the interface perpendicular to the cylinder axis and the circumferential notch at, or parallel to, the interface. Critical J values for crack extension in mode III were found to be a factor 1.1 to 2.1 higher than under comparable mode I loading.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1460-2695.1997.tb01511.x

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Digitale Medien

THE MINIATURISATION OF THE 4-POINT-BEND TEST (1997)

Lube, T. ; Manner, M. ; Danzer, R.

Oxford, UK : Blackwell Publishing Ltd

Fatigue & fracture of engineering materials & structures 20 (1997), S. 0

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Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Maschinenbau

Notizen: Abstract— Strength measurements are becoming increasingly important for electroceramics. Bending of specimens small enough to be cut out of small electroceramic components may be one possibility. Therefore the miniaturisation of the 4-point bend-test for ceramic specimens is now being attempted. In this paper the errors in determining the flexural strength arising from the test principle itself, plus the geometry and measuring inaccuracies are calculated and expressed as a function of the outer span length. Contact pressure and a tolerable total measuring inaccuracy determines the dimensions of miniature specimens and fixtures. The possibilities of appropriate specimen preparation are also investigated.Ceramic materials show a volume (i.e. a specimen size) dependence of strength which is described by Weibull's statistical theory. The applicability of the miniature bend-fixtures is demonstrated by measuring this volume effect.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1460-2695.1997.tb01514.x

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Digitale Medien

AN IMPROVED NUMERICAL TECHNIQUE FOR SIMULATING THE GROWTH OF PLANAR FATIGUE CRACKS (1997)

Lin, X. B. ; Smith, R. A.

Oxford, UK : Blackwell Publishing Ltd

Fatigue & fracture of engineering materials & structures 20 (1997), S. 0

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ISSN: 1460-2695

Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Maschinenbau

Notizen: Abstract— This paper describes a versatile technique for simulating the fatigue growth of a wide range of planar cracks of practical significance. Crack growth is predicted on a step-by-step basis from the Paris law using stress intensity factors calculated by the finite element method. The crack front is defined by a cubic spline curve from a set of nodes. Both the 1/4-node crack opening displacement and the three-dimensional J-integral (energy release rate) methods are used to calculate the stress intensity factors. Automatic remeshing of the finite element model to a new position which defines the new crack front enables the crack propagation to be followed. The accuracy and capability of this finite element simulation technique are demonstrated in this paper by the investigation of various problems of both theoretical and practical interest. These include the shape growth trend of an embedded initially penny-shaped defect and an embedded initially elliptical defect in an infinite body, the growth of a semi-elliptical surface crack in a finite thickness plate under tension and bending, the propagation of an internal crack in a round bar and the shape change of an external surface crack in a pressure vessel.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1460-2695.1997.tb01495.x

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Digitale Medien

RELAXATION OF RESIDUAL STRESSES AT COLD-WORKED FASTENER HOLES DUE TO FATIGUE LOADING (1997)

ÖZdemir, A. T. ; Edwards, L.

Oxford, UK : Blackwell Publishing Ltd

Fatigue & fracture of engineering materials & structures 20 (1997), S. 0

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Quelle: Blackwell Publishing Journal Backfiles 1879-2005

Thema: Maschinenbau

Notizen: Abstract— Cold-expansion of fastener holes is now commonly used within the aerospace industry to increase the fatigue endurance of airframes. Although a number of methods of cold expansion are possible, the split-sleeve cold-expansion process is the most widely accepted and is frequently used in the repair and manufacture stages of both military and civil aircraft. In the present work, the redistribution of residual hoop stresses due to the application of constant amplitude fatigue loading at 4% cold-expanded holes has been studied. A modified Sachs method was adopted to evaluate the residual stress profiles and a replication technique was used to quantify crack growth. It was found that the decay of the residual hoop stress profile near the bore of the hole was due to the initiation and growth of small fatigue cracks. Cracks were found to initiate both near and below the fatigue limit, but subsequently arrested so stabilising the overall residual stress profile.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1460-2695.1997.tb01501.x

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Digitale Medien

FACTORS CONTROLLING THE FATIGUE STRENGTH OF NITRIDED TITANIUM (1997)

Morita, T. ; Takahashi, H. ; Shimizu, M. ; [weitere]

Oxford, UK : Blackwell Publishing Ltd

Fatigue & fracture of engineering materials & structures 20 (1997), S. 0

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Quelle: Blackwell Publishing Journal Backfiles 1879-2005

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Notizen: Abstract— The factors affecting the fatigue strength of nitrided titanium were clarified. The fatigue strength depended strongly on the fracture strength of the compound layer formed on the surface by nitriding. We found a Hall-Petch relationship between the fatigue strength of nitrided titanium and the grain size. The findings indicated that the reduction in the fatigue strength by nitriding results from both the formation of the compound layer possessing low fracture strength and grain growth occurring from ordinary nitriding. Furthermore, low-temperature nitriding (620°C, 24 h) was proposed to suppress grain growth. This treatment method improved not only the wear resistance and the corrosion resistance but also the fatigue strength of titanium.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1111/j.1460-2695.1997.tb00404.x

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Digitale Medien

Soluble Segmented Stepladder poly(p-phenylenes) for Blue-Light-Emitting Diodes (1995)

Grem, G. ; Paar, C. ; Stampfl, J. ; [weitere]

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 2-4

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ISSN: 1520-5002

Quelle: ACS Legacy Archives

Thema: Chemie und Pharmazie , Maschinenbau

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/cm00049a001

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Digitale Medien

Dynamic Quenching of Porous Silicon Photoluminescence by Anthracene and 10-Methylphenothiazine (1995)

Ko, Minh C. ; Meyer, Gerald J.

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 12-14

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ISSN: 1520-5002

Quelle: ACS Legacy Archives

Thema: Chemie und Pharmazie , Maschinenbau

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/cm00049a004

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Digitale Medien

Inclusion of Organic Vapors by Crystalline, Solvatochromic [Pt(aryl isonitrile)4][Pd(CN)4] Compounds. "Vapochromic" Environmental Sensors (1995)

Exstrom, Christopher L. ; Sowa, John R. Jr. ; Daws, Charles A. ; [weitere]

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 15-17

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ISSN: 1520-5002

Quelle: ACS Legacy Archives

Thema: Chemie und Pharmazie , Maschinenbau

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/cm00049a005

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Digitale Medien

Preparation and Characterization of Spherical Calcium Hydroxyapatite (1995)

Kandori, Kazuhiko ; Yasukawa, Akemi ; Ishikawa, Tatsuo

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 26-32

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ISSN: 1520-5002

Quelle: ACS Legacy Archives

Thema: Chemie und Pharmazie , Maschinenbau

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/cm00049a007

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Digitale Medien

Preparation and Structural Characterization of Two New Phases of Aluminum Trifluoride (1995)

Herron, Norman ; Thorn, David L. ; Harlow, Richard L. ; [weitere]

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 75-83

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ISSN: 1520-5002

Quelle: ACS Legacy Archives

Thema: Chemie und Pharmazie , Maschinenbau

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/cm00049a013

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Digitale Medien

Exploring the Limits of the Zintl Concept for the A14MPn11 Structure Type with M = Zn, Cd (1995)

Young, Dianna M. ; Torardi, Charles C. ; Olmstead, Marilyn M. ; [weitere]

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 93-101

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ISSN: 1520-5002

Quelle: ACS Legacy Archives

Thema: Chemie und Pharmazie , Maschinenbau

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/cm00049a015

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Vibrational Spectra and Molecular Organization in Thin Solid Films of 2,3-Naphthalocyanines (1995)

Gobernado-Mitre, I. ; Aroca, R. ; DeSaja, J. A.

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 118-122

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Room-Temperature Photoinduced Poling and Thermal Poling of a Rigid Main-Chain Polymer with Polar Azo Dyes in the Side Chain (1995)

Sekkat, Z. ; Kang, C.-S. ; Aust, E. F. ; [weitere]

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 142-147

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Synthesis and Structural Characterization of Sodalites with Acetate and Formate Guest Anions, [Na4(CH3COO)]2[Al3Si3O12]2 and [Na4(HCOO)]2[Al3Si3O12]2, and their Intracage Oxidation Product [Na5(CO3)][Na3.box.][Al3Si3O12]2 (1995)

Sieger, Peter ; Schneider, Andreas M. ; Wiebcke, Michael ; [weitere]

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Chemistry of materials 7 (1995), S. 163-170

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{Perfluorosulfonate Ionomer]/[Mixed Inorganic Oxide] Nanocomposites via Polymer-in Situ Sol-Gel Chemistry (1995)

Shao, Phoebe L. ; Mauritz, K. A. ; Moore, R. B.

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Chemistry of materials 7 (1995), S. 192-200

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Synthesis of Niobium Carbide from Niobium Oxide Aerogels (1995)

Teixeira da Silva, V. L. S. ; Ko, E. I. ; Schmal, M. ; [weitere]

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Chemistry of materials 7 (1995), S. 179-184

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Syntheses of Second-Order Nonlinear Optical Polyurethanes for Electrooptic Etalons (1995)

Wang, N. Patrick ; Leslie, Thomas M. ; Wang, Shuping ; [weitere]

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Chemistry of materials 7 (1995), S. 185-191

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Formation of a Nanocomposite Containing Particles of Co3C from a Single-Source Precursor Bound to a Silica Xerogel Host Matrix (1995)

Carpenter, Joseph P. ; Lukehart, C. M. ; Stock, S. R. ; [weitere]

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Chemistry of materials 7 (1995), S. 201-205

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Preparation, Structure, and Electronic Properties of Ca11MSb9 (M = Al, Ga, In) (1995)

Young, Dianna M. ; Kauzlarich, Susan M.

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Chemistry of materials 7 (1995), S. 206-209

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Oriented films of LaNiO3 and other members of the Lan+1NinO3n+1 series, LaCuO3-.delta. and Pb(Zr0.52Ti0.48)O3, obtained by nebulized spray pyrolysis (1995)

Raju, A. R. ; Aiyer, Hemantkumar N. ; Rao, C. N. R.

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Chemistry of materials 7 (1995), S. 225-231

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Electronic and magnetic properties of organometallic intercalates of zirconium dichalcogenides (1995)

Wong, Heng-Vee ; Millett, Richard ; Evans, John S. O. ; [weitere]

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Chemistry of materials 7 (1995), S. 210-214

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Preparation, Characterization, and Moessbauer Spectroscopy of Organic Anion Intercalated Pyroaurite-like Layered Double Hydroxides (1995)

Raki, Laiela ; Rancourt, Denis G. ; Detellier, Christian

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Chemistry of materials 7 (1995), S. 221-224

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Effect of Molecular Polarization on Bond-Length Alternation, Linear Polarizability, First and Second Hyperpolarizability in Donor-Acceptor Polyenes as a Function of Chain Length (1995)

Gorman, Christopher B. ; Marder, Seth R.

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Chemistry of materials 7 (1995), S. 215-220

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Ordered Conducting Films of the Inorganic Polymer (LiMo3Se3)n Cast From Solution (1995)

Golden, Josh H. ; DiSalvo, Francis J. ; Frechet, Jean M. J.

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Chemistry of materials 7 (1995), S. 232-235

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Use of a Patterned Self-Assembled Monolayer To Control the Formation of a Liquid Resist Pattern on a Gold Surface (1995)

Gorman, Christopher B. ; Biebuyck, Hans A. ; Whitesides, George M.

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Chemistry of materials 7 (1995), S. 252-254

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Synthesis of Semicrystalline Materials by Organic Compound Intercalation into Amorphous Titanium Phosphate (1995)

Bortun, Anatoly ; Strelko, Vladimir V. ; Jaimez, Enrique ; [weitere]

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Chemistry of materials 7 (1995), S. 249-251

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Protonation of Oligothiophenes (1995)

Yu, Yuan ; Gunic, Esmir ; Miller, Larry L.

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Chemistry of materials 7 (1995), S. 255-256

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Poly(vinylsilane), [CH2CH(SiH3)]n: Preparation, Characterization, and Utilization as a Preceramic Polymer (1995)

Seyferth, Dietmar ; Tasi, Miklos ; Woo, Hee-Gweon

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Chemistry of materials 7 (1995), S. 236-243

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Synthesis and Structure of the Novel Nanoporous Tin(IV) Sulfide Material TPA-SnS-3 (1995)

Jiang, Tong ; Lough, Alan J. ; Ozin, Geoffrey A. ; [weitere]

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Chemistry of materials 7 (1995), S. 245-248

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Synthesis, Structure, and Characteristics of the New Host Material [(C3N3)2(NH)3]n (1995)

Kawaguchi, Masayuki ; Nozaki, Koji

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Chemistry of materials 7 (1995), S. 257-264

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Formation and Characterization of Novel Organodisilicate Glasses (1995)

Barrie, Patrick J. ; Carr, Stuart W. ; Ou, Duan Li ; [weitere]

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Chemistry of materials 7 (1995), S. 265-270

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Photoinduced Doping and Photolithography of Methyl-Substituted Polyaniline (1995)

Venugopal, G. ; Quan, X. ; Johnson, G. E. ; [weitere]

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Chemistry of materials 7 (1995), S. 271-276

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Charge- and Ion-Transport Properties of Polypyrrole/Poly(styrenesulfonate):Poly(3-octylthiophene) Bilayers (1995)

Demoustier-Champagne, Sophie ; Reynolds, John R. ; Pomerantz, Martin

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Chemistry of materials 7 (1995), S. 277-283

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Near-Infrared Dyes Encapsulated in Sol-Gel Matrixes (1995)

del Monte, Francisco ; Levy, David

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Chemistry of materials 7 (1995), S. 292-298

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Linear Polymers for Nonlinear Optics. 4. Synthesis and Nonlinear Optical Properties of Side-Chain Poly(methacrylates) with Vinylcyanosulfonyl Groups (1995)

Robello, Douglas R. ; Dao, Phat T. ; Schildkraut, Jay S. ; [weitere]

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Chemistry of materials 7 (1995), S. 284-291

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Salt-Gel Synthesis of Porous Transition-Metal Oxides (1995)

Stein, Andreas ; Fendorf, Mark ; Jarvie, Thomas P. ; [weitere]

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Chemistry of materials 7 (1995), S. 304-313

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Boron Nitride Matrixes and Coatings Obtained from Tris(methylamino)borane. Application to the Protection of Graphite against Oxidation (1995)

Bonnetot, B. ; Guilhon, F. ; Viala, J. C. ; [weitere]

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Chemistry of materials 7 (1995), S. 299-303

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Inert Carbon Free Radicals. 12. Synthesis, Electronic Spectra, and Magnetic Properties of Stable Polymeric Polyradicals with Perchlorotriphenylmethyl Radical Units (1995)

Domingo, V. M. ; Castaner, J. ; Riera, J. ; [weitere]

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Chemistry of materials 7 (1995), S. 314-323

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Vapor Deposition Photopolymerization of Long-Chain Vinyl Compounds: Polymerizability and Molecular Orientation of n-Octadecyl Acrylate (1995)

Orihashi, Yuji ; Iwata, Ryusuke ; Taniguchi, Isamu ; [weitere]

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Chemistry of materials 7 (1995), S. 324-332

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Polymorphs of Ln2MoO6: A Neutron Diffraction Investigation of the Crystal Structures of La2MoO6 and Tb2MoO6 (1995)

Xue, J. S. ; Antonio, Mark R. ; Soderholm, L.

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Chemistry of materials 7 (1995), S. 333-340

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Preparation, Characterization, and Thermal Behavior of a New High Oxide Ion Conductor: Bismuth Uranium Lanthanum Oxide (1995)

Amarilla, J. M. ; Rojas, R. M. ; Herrero, M. P.

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Chemistry of materials 7 (1995), S. 341-347

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Water Content and Particle Texture of Synthetic Hydrotalcite-like Layered Double Hydroxides (1995)

Yun, Sang Kyeong ; Pinnavaia, Thomas J.

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Chemistry of materials 7 (1995), S. 348-354

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High-Pressure Synthesis and Structure of the New Spinel-Related Series LnCu2O4 (Ln = Nd, Gd, Er, Lu, Y) (1995)

Chen, Bai-Hao ; Walker, David ; Suard, Emmanuelle Y. ; [weitere]

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Chemistry of materials 7 (1995), S. 355-358

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Organorhodium Complex on Smectite Clay: Preparation, Characterization, and Catalytic Activity for the Hydroformylation of Vinylsilanes (1995)

Valli, V. L. K. ; Alper, H.

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Chemistry of materials 7 (1995), S. 359-362

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Mobility and Relaxation Determinations of Lithium in Lithium Aluminate Ceramics Using Solid-State NMR Spectroscopy (1995)

Stewart, F. F. ; Stebbins, J. F. ; Peterson, E. S. ; [weitere]

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Chemistry of materials 7 (1995), S. 363-367

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Supramolecular Liquid-Crystalline Complexes Exhibiting Room-Temperature Mesophases and Electrooptic Effects. Hydrogen-Bonded Mesogens Derived from Alkylpyridines and Benzoic Acids (1995)

Kato, Takashi ; Fukumasa, Mitsuo ; Frechet, Jean M. J.

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Chemistry of materials 7 (1995), S. 368-372

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URL: http://dx.doi.org/10.1021/cm00050a021

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Synthesis and Structural Characterization of Reduced Ternary Tantalum Oxides in the Tetragonal Tungsten Bronze Structure (1995)

Feger, Christopher R. ; Ziebarth, R. P.

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 373-378

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Thema: Chemie und Pharmazie , Maschinenbau

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1021/cm00050a022

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85

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Li+ Extraction/Insertion Reactions with LiZn0.5Mn1.5O4 Spinel in the Aqueous Phase (1995)

Feng, Qi ; Kanoh, Hirofumi ; Miyai, Yoshitaka ; [weitere]

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 379-384

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URL: http://dx.doi.org/10.1021/cm00050a023

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86

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Room-Temperature Phosphorescence of Amorphous Metal Complexes of Aliphatic Carboxylic Acids with Basic Amino Acids (1995)

Turk, Richard S. ; Dulebohn, Joel I. ; Vail, DeLynne

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 385-390

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URL: http://dx.doi.org/10.1021/cm00050a024

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87

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Characterization of Hydrogen-Bond Breaking and Surface Reconstruction in Mixed-Valence Chain Compounds [Pt(en)2][Pt(en)2X2](ClO4)4 by Atomic Force Microscopy (1995)

Bar, G. ; Scott, B. ; Johnson, S. R. ; [weitere]

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 391-399

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URL: http://dx.doi.org/10.1021/cm00050a025

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88

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Chromophore Environmental Effects in Saltlike Nonlinear Optical Materials. A Computational Study of Architecture/Anion Second-Order Response Relationships in High-.beta. Stilbazolium Self-Assembled Films (1995)

Bella, Santo Di ; Fragala, Ignazio ; Ratner, Mark A. ; [weitere]

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 400-404

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URL: http://dx.doi.org/10.1021/cm00050a026

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89

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Synthesis and Reactivity of Modified Electrodes Derived from TiCl4 and Other Early-Transition-Metal Complexes (1995)

Ching, Stanton ; Tabet, Elie A. ; Dudek, Raymond C. ; [weitere]

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 405-411

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URL: http://dx.doi.org/10.1021/cm00050a027

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90

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Negative Thermal Expansion and Phase Transitions in the ZrV2-xPxO7 Series (1995)

Korthuis, V. ; Khosrovani, N. ; Sleight, A. W. ; [weitere]

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 412-417

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URL: http://dx.doi.org/10.1021/cm00050a028

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Solid-State Ordering and Potential Dependence of Conductivity in Poly(2,5-dialkoxy-p-phenyleneethynylene) (1995)

Ofer, David ; Swager, Timothy M. ; Wrighton, Mark S.

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 418-425

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URL: http://dx.doi.org/10.1021/cm00050a029

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92

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Second-Order Nonlinear Optical Properties of Substituted Arylphosphine Oxides (1995)

Kott, Kevin L. ; Whitaker, Craig M. ; McMahon, Robert J.

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 426-439

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URL: http://dx.doi.org/10.1021/cm00050a030

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A New C60 Polymer via Ring-Opening Metathesis Polymerization (1995)

Zhang, Naijie ; Schricker, Scott R. ; Wudl, Fred ; [weitere]

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 441-442

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URL: http://dx.doi.org/10.1021/cm00051a001

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94

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Camphorsulfonic Acid Fully Doped Polyaniline Emeraldine Salt: Conformations in Different Solvents Studied by an Ultraviolet/Visible/Near-Infrared Spectroscopic Method (1995)

Xia, Younan ; Wiesinger, Joanna M. ; MacDiarmid, Alan G. ; [weitere]

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 443-445

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URL: http://dx.doi.org/10.1021/cm00051a002

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95

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High-Temperature Chemical and Microstructural Transformations of a Nanocomposite Organoceramic (1995)

Messersmith, Phillip B. ; Stupp, Samuel I.

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 454-460

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URL: http://dx.doi.org/10.1021/cm00051a004

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Preparation and Utilization of Organically Modified Silica-Titania Photocatalysts for Decontamination of Aquatic Environments (1995)

Dagan, Geula ; Sampath, Srinivasan ; Lev, Ovadia

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 446-453

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URL: http://dx.doi.org/10.1021/cm00051a003

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Polymorphism and Alloys in the Bis(ethylenedithio)tetrathiafulvalene/M(CN)42- Radical Cation Salts. Structural and Physical Properties of .alpha.,.delta.-(ET)4[Ni(CN)4]x[Pt(CN)4]1-x(H2O)n (1995)

Fettouhi, M. ; Ouahab, L. ; Grandjean, D. ; [weitere]

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 461-471

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URL: http://dx.doi.org/10.1021/cm00051a005

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98

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Solid-State Synthesis, Crystal Structure, and Nonlinear Refractive and Absorptive Properties of the New Cluster (n-Bu4N)2[MoOS3Cu3BrCl2] (1995)

Hou, Hongwei ; Ye, Xiangrong ; Xin, Xinquan ; [weitere]

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 472-476

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URL: http://dx.doi.org/10.1021/cm00051a006

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Multiband analysis of photoluminescence spectra from electronically excited gas-phase species produced during laser ablation of lead oxide, zirconium oxide, titanium oxide, and lead zirconate titanate targets (1995)

Barnes, N. R. ; Dat, R. ; Lichtenwalner, D. J. ; [weitere]

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 477-485

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URL: http://dx.doi.org/10.1021/cm00051a007

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Structure and Magnetism of La4Mn5Si4O22 and La4V5Si4O22: Two New Rare-Earth Transition Metal Sorosilicates (1995)

Gueho, C. ; Giaquinta, D. ; Mansot, J. L. ; [weitere]

s.l. : American Chemical Society

Chemistry of materials 7 (1995), S. 486-492

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URL: http://dx.doi.org/10.1021/cm00051a008

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