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  • 1
    Electronic Resource
    Electronic Resource
    Phénomène de défocalisation lié à la géométrie de la chambre de texture de Schulz et incidence sur l'intensité mesurée (1971)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 4 (1971), S. 461-472 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: The Schulz reflexion method used to draw the {hkl} pole figures of a sample having one or several textures does not allow the definition of the outer part of these figures since the diffracted beam defocuses at low values of the tilt angle, φ. Relationships are established to correct the recorded diffracted intensity so that the outer part of pole figures can be outlined. The defocusing effects of the various slits are surveyed and correction curves are presented. The intensity diffracted by a theoretical isotropic sample (rather difficult to get in practice) is calculated from diagrams recorded on a textured specimen. A quantitative analysis of the results obtained on various samples and a detailed study of the texture evolution become possible. An example is given for a rolled OFHC copper sample.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889871007477
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  • 2
    Electronic Resource
    Electronic Resource
    Rearrangement phenomenon developed inside powder compacts: theoretical model expressing the associated shrinkage (1984)
    Springer
    Journal of materials science 19 (1984), S. 2599-2605 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A distinct new Stage 0 has been resolved which precedes the normal Stage 1 in the sintering curves of iron powder composed of smooth spherical particles. It can, therefore, be resolved only under conditions of high-speed dilatometry, where the errors induced by heating are minimized. The temperature and pressure dependence of Stage 0 suggests that this kinetic regime is related to the relaxation of tangential interparticle stresses caused by incomplete compaction. To take into account the experimental results a model is proposed. The agreement between the dilatometric curves calculated from this model and the experimental ones is good.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00550815
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  • 3
    Electronic Resource
    Electronic Resource
    A comparison of the structural evolution occurring during anisothermal or isothermal treatments in the case of nickel and manganese type maraging alloys (1985)
    Springer
    Journal of materials science 20 (1985), S. 3339-3352 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract This paper reports a comparison of the structural evolution of nickel and manganese type maraging steels. The dilatometric behaviour was studied during anisothermal treatments performed at different rates. Furthermore, the evolution of the microstructure was followed during isothermal ageing with the help of electron microscopy and microdiffraction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00545204
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  • 4
    Electronic Resource
    Electronic Resource
    TEM investigation of the tempering behaviour of the maraging PH 17.4 Mo stainless steel (1987)
    Springer
    Journal of materials science 22 (1987), S. 2297-2304 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The PH 17-4 Mo steel (Z6 CND 17.04.02), used in the steam generator of nuclear reactors, was investigated in order to determine the structural evolution occurring during tempering carried out under various conditions of duration and temperature. The formation and growth of different types of carbides such as Mo2C, M23C6 and M7C3 and of Fe2Mo intermetallic compound were studied and also of reversed austenite. A small secondary hardening peak was observed for tempering close to 400' C which is related to the Mo2C carbide precipitation; beyond this temperature, softening occurs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01082107
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  • 5
    Electronic Resource
    Electronic Resource
    Order disorder transition in Fe-Cr σ-phase (1983)
    Springer
    Journal of materials science 2 (1983), S. 283-284 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00723256
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  • 6
    Electronic Resource
    Electronic Resource
    Thermal expansion of Pyros from 20 to 1273 K (1985)
    Springer
    International journal of thermophysics 6 (1985), S. 715-721 
    Details
    ISSN: 1572-9567
    Keywords: expansivity ; high temperatures ; low temperatures ; Ni alloy ; Pyros ; reference material ; thermal expansion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Pyros, which is a Ni-base alloy (82% Ni, 8% Cr, 4% W, 3% Mn, and 3% Fe), has been used extensively in France since 1926 as a temperature sensor and as a reference material for thermal expansion measurements. In this paper we present recent data on the expansion and expansivity of Pyros from 20 to 1273 K. Expansivity results, obtained by taking the derivative of a cubic-spline polynomial fitting performed to the ΔL/L experimental data, show that Pyros is a stable material in the 20 to 1273 K temperature range. Furthermore, since the expansivity values are similar to those of steels, Pyros should be of special interest to laboratories which are concerned with expansion measurements on steels. Therefore, we suggest that Pyros be considered as a suitable reference material for thermal expansion measurements on steels, and until more accurate results are obtained, we propose our results as reference data between 20 and 1273 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00500342
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  • 7
    Electronic Resource
    Electronic Resource
    Sintering of (alumina + titanium) powder mixtures and elaboration of the corresponding cermets (1989)
    Springer
    Journal of materials science 24 (1989), S. 3123-3136 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract We considered the possible formation of a bond between a ceramic (Al2O3) and a metal (titanium). We first concluded that a direct bonding of these two materials would be very unsatisfactory. We managed to obtain good bonding through an (Al2O3 +xTi) cermet placed between the two initial materials. Diffusion tests with Al2O3/Ti or (Al2O3 +xTi)/Ti couples have shown the appearance of densified layers in the diffusion zone. The study of the influence of the titanium content in the cermet permitted values ofx to be determined which give an appropriate continuity (10 ⩽x ⩽ 25 wt%) across the interface. Measurements by micro probe have shown that the mobility of the Al3+ ion has a predominant influence in the process leading to the bonding. The nature of the sintering atmosphere plays an important role in the sintering capacity of (Al2O3 +xTi) cermet as well as the densification of the samples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01139030
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  • 8
    Electronic Resource
    Electronic Resource
    Structural study of spheroidal graphite cast iron with 4% Si and Mo additions; effects of thermal treatment (1992)
    Springer
    Hyperfine interactions 69 (1992), S. 439-442 
    Details
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The Mössbauer spectrum of the as-cast sample is in agreement with a statistical distribution of Si. The carbides of (Fe−Mo−Si)3C and (Fe−Mo−Si)6C type are paramagnetic down to 77 K. The Mössbauer spectrum of the as-quenched sample is mainly influenced by Si. For the tempered samples, a gradual disappearence of austenite is observed while the transformation of martensite into ferrite detected from the hyperfine field distribution occurs between 773 K and 873 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02401859
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  • 9
    Electronic Resource
    Electronic Resource
    Identification of intermetallic compounds formed during sintering of the Fe--Mo--W ternary system (1997)
    Springer
    Journal of materials science 16 (1997), S. 1240-1244 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Abstracts are not published in this journal
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018550202914
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  • 10
    Electronic Resource
    Electronic Resource
    Processes involved during the production of Fe–W–Mo alloys by powder metallurgy (1998)
    Springer
    Journal of materials science 33 (1998), S. 2431-2440 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Sintering of Fe–W–Mo systems under a dynamic atmosphere of argon has been studied by different experimental techniques, including dilatometric trials, X-ray diffraction, optical microscopy and electron probe microanalysis. It has been found that sintering at 1300°C for only 10 min allows compacts to be obtained with a relative density close to 80%. The results also show an improvement in the final density by molybdenum addition. On the other hand, the structure of the sintered samples was, mainly, constituted of a soft matrix of (Fe–M)α solid solutions (∼300 Hv) in which hard intermetallic compounds (∼1200 Hv) are dispersed. Furthermore, perturbing expansions have been observed during the sintering cycle. The first expansion occurred at about 620°C as a consequence of a Kirkendall effect. The second one arose at about 890°C in relation to Fe7M6 (where M is tungsten or molybdenum) formation. The latter expansion occurred at about 1200°C as a consequence of an increase in tungsten diffusion from indiffused areas to (Fe–M)a solid solutions and intermetallic compounds. © 1998 Chapman & Hall
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004368227583
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