ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Ihre E-Mail wurde erfolgreich gesendet. Bitte prüfen Sie Ihren Maileingang.

Leider ist ein Fehler beim E-Mail-Versand aufgetreten. Bitte versuchen Sie es erneut.

Vorgang fortführen?

Exportieren
  • 1
    Digitale Medien
    Digitale Medien
    DAMAGE MECHANISMS IN ALLOY 800H UNDER CREEP-FATIGUE CONDITIONS (1994)
    Oxford, UK : Blackwell Publishing Ltd
    Fatigue & fracture of engineering materials & structures 17 (1994), S. 0 
    Details
    ISSN: 1460-2695
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Maschinenbau
    Notizen: Abstract— The interaction between fatigue damage (i.e., fatigue crack propagation) and internal grain boundary damage (i.e., cavity formation at grain boundaries) has been studied for the Alloy 800H at 750°C for constant plastic strain ranges but different experimental conditions. Most experiments were performed at constant ranges of alternating tensile/compression stresses. Symmetrical as well as asymmetrical tests (with larger compression stresses) were performed. In comparison to the former tests, asymmetrical tests led to shorter cyclic lifetimes mainly due to cavity formation which was not observed for symmetrical tests. It could be shown that a fast compressive and a slow tensile half cycle (at large compressive and low tensile stresses) are ideal conditions for the nucleation and growth of cavities. Based on quantitative measurements of the cavity density from interrupted fatigue tests, a physical model is presented which can predict the number of cycles to failure. This cycle number is determined only by fatigue crack growth which is controlled by (a) athermal plastic deformation, (b) creep deformation and (c) rate enhancement by cavitation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1460-2695.1994.tb00252.x
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 2
    Digitale Medien
    Digitale Medien
    The study of inhomogeneities in solid solutions (1974)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 7 (1974), S. 210-210 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: Three primary investigation techniques are useful for studying clusters or small particles in solid solution: X-ray small-angle scattering, neutron small-angle scattering, and transmission electron microscopy. Advantages and disadvantages of these methods will be discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889874009290
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 3
    Digitale Medien
    Digitale Medien
    Evidence of non-cubic lattice distortions around vacant sites in Co–Ga β' phases (1978)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 11 (1978), S. 153-155 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: Diffuse X-ray diffraction from Co-Ga single crystals containing 48 to 56 at.% Co gives evidence for strong distortion fields around vacant sites in the Co sublattice and less strong fields around Co atoms on the Ga sublattice. The distortion is comparable to that occurring in Zr-20 wt.% Nb alloys and is characterized by shifts of atoms parallel to (111). The distortion has some similarity to the atomic structure of the ω phase found in Zr-10 wt % Nb.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889878012959
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 4
    Digitale Medien
    Digitale Medien
    Comparison of X-ray and neutron small-angle scattering from an Al–Zn alloy (1978)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 11 (1978), S. 581-583 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: The normalized integrated small-angle scattered intensity for Al-Zn alloys should be independent of whether the measurements are made with X-rays or neutrons. In order to check this, and thus the correction and standardization processes, the small-angle scattering from an Al-5.05 at.% Zn alloy containing GP zones was measured with these two types of radiation. The data were corrected and converted to absolute units with reference to the commonly accepted secondary standards: vanadium for the neutron data and polyethylene (Lupolen) for the X-ray data. The results are shown to differ by, at best, 6% if reasonable values for the change in atomic volume with alloy composition are taken into account. These findings are compared with those available from the literature, and the consistency is found to be somewhat lacking. Additional careful work is clearly needed to determine if the difficulty is traceable to the data correction or to the conversion to absolute units.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S002188987801393X
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 5
    Digitale Medien
    Digitale Medien
    Small-angle scattering applications to materials science (1978)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 11 (1978), S. 376-404 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: The review describes results of the last three or four years from the application of both X-ray and neutron small-angle scattering (SAS) to problems in the general field of materials science. A wide range of topics has been covered including phase separation in binary and ternary systems (early stages as well as the determination of the metastable miscibility gap), density and concentration fluctuations in single-phase systems, and studies of various structural defects such as voids, radiation damage, dislocations, and surfaces and interfaces. The interaction between magnetic moments and neutrons has made possible SAS research on the long-range interaction of spins in complicated magnetic systems and flux-line studies in type-II superconductors, and this work is also reviewed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889878013497
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 6
    Digitale Medien
    Digitale Medien
    On the determination of the metastable miscibility gap in ternary alloys from small-angle measurements. I. Theoretical background (1977)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 10 (1977), S. 25-27 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: Metastable precipitation as the formation of GP zones is governed by a metastable miscibility gap. It is shown that the limits of this gap in a ternary system can be determined from combined analysis of the small-angle scattering (SAS) of X-rays and of neutrons. The necessary condition is a significantly different ratio β = (bC−bA)/(bB−bA) of the atomic scattering amplitudes b of the components A, B and C for both the X-rays and the neutrons. This difference enables one to determine the slope of the tie-line passing through an individual alloy by comparing the integrated SAS intensities of the two types of radiation. Thereafter, the determination of the gap limits follows the same procedure as already known for binary alloys. The change of the mean atomic volume with composition influences the result, but this can be taken into account provided the same Vegard's law is valid for both the depleted matrix and the precipitate.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889877012746
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 7
    Digitale Medien
    Digitale Medien
    On the determination of the metastable miscibility gap in ternary alloys from small-angle measurements. II. Application to the system Al–Zn–Mg (1977)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 10 (1977), S. 28-31 
    Details
    ISSN: 1600-5767
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie , Physik
    Notizen: The method described in the preceding paper [Gerold (1977), J. Appl. Cryst. 10, 25–27] has been applied to the system Al–Zn–Mg where the small-angle scattering has been measured from nine alloys having zinc and magnesium contents up to 5.4 and 2.5 at. %, respectively. The alloys were annealed at room temperature where the metastable equilibrium of GP zone formation is reached after about one month. From combined analysis of the X-ray and neutron results the slopes of the tie-lines have been evaluated in this region of the phase diagram. The further analysis leads to the approximate determination of the miscibility gap limits. The confidence limits of the determination were restricted by it not being possible to make measurements far enough out in the tail of the neutron scattering profile from the small GP zones (diameter less than 30 Å) to allow the background intensity to be separated completely satisfactorily. The ultimate limiting factor for this type of analysis may be the accuracy to which the mean atomic volumes are known.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0021889877012758
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 8
    Digitale Medien
    Digitale Medien
    Neue Methoden zur Eliminierung des Spalteinflusses von röntgenographischen Kleinwinkelaufnahmen (1957)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 10 (1957), S. 287-290 
    Details
    ISSN: 0001-5520
    Quelle: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Thema: Geologie und Paläontologie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1107/S0365110X57000869
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 9
    Digitale Medien
    Digitale Medien
    Defect structure and magnetic moments in the β-phases of CoAl and CoGa
    Amsterdam : Elsevier
    Journal of Physics and Chemistry of Solids 34 (1973), S. 1461-1466 
    Details
    ISSN: 0022-3697
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Chemie und Pharmazie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1016/S0022-3697(73)80218-5
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
  • 10
    Digitale Medien
    Digitale Medien
    Effect of structural changes on some physical properties of Au"4V
    Amsterdam : Elsevier
    Journal of Physics and Chemistry of Solids 39 (1978), S. 167-170 
    Details
    ISSN: 0022-3697
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Chemie und Pharmazie , Physik
    Materialart: Digitale Medien
    URL: http://linkinghub.elsevier.com/retrieve/pii/0022-3697(78)90218-4
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Artikel (Nationallizenzen)
    Volltext
Schließen ⊗
Diese Webseite nutzt Cookies und das Analyse-Tool Matomo. Weitere Informationen finden Sie hier...