Poisson Effects on X-Ray Diffraction Patterns in Low-Temperature-Carburized Austenitic Stainless Steel

被引：37

作者：

Kahn, H. ^{[1
]}

Michal, G. M. ^{[1
]}

Ernst, F. ^{[1
]}

Heuer, A. H. ^{[1
]}

机构：

[1] Case Western Reserve Univ, Dept Mat Sci & Engn, Cleveland, OH 44106 USA

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2009年 / 40A卷 / 08期

关键词：

CARBON SUPERSATURATION; ELASTIC-CONSTANTS; S-PHASE; POLYCRYSTAL;

D O I：

10.1007/s11661-009-9814-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Austenitic stainless steel was carburized at low temperature to generate a hard surface layer. X-ray diffractometry (XRD) revealed that this "case" contained an expanded fcc lattice and significant residual stresses due to the interstitial carbon. The XRD patterns also exhibit consistent variations with crystallographic orientation. Using published elastic constants for austenitic stainless steel and appropriate approximations for the XRD elastic constants, the XRD peak position variations can be accounted for by orientation-dependent Poisson effects due to biaxial residual stresses. The XRD patterns of specimens containing either compressive or tensile residual stresses were consistent with this hypothesis.

引用

页码：1799 / 1804

页数：6

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