Influence of the microstructure on the residual stresses of nitrided iron-chromium alloys

被引：40

作者：

Diaz, N. E. Vives ^{[2
]}

Schacherl, R. E. ^{[1
,2
]}

Zagonel, L. F. ^{[1
,2
]}

Mittemeijer, E. J. ^{[1
,2
]}

机构：

[1] Univ Stuttgart, Inst Phys Met, D-7000 Stuttgart, Germany

[2] Max Planck Inst Met Res, D-70569 Stuttgart, Germany

来源：

ACTA MATERIALIA | 2008年 / 56卷 / 06期

关键词：

nitrides; iron alloys; residual stresses; discontinuous coarsening;

D O I：

10.1016/j.actamat.2007.11.012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Different iron-chromium alloys (4, 8, 13 and 20 wt.%Cr) were nitrided in a NH3/H-2 gas mixture at 580 degrees C for various times. The nitrided microstructure was characterized by X-ray diffraction, light microscopy and hardness measurements. Composition depth profiles of the nitrided zone were determined by electron-probe microanalysis. Residual stress-depth profiles of the nitrided specimens were measured using the (X-ray) diffraction sin(2)psi method in combination with cumulative sublayer removals and correction for corresponding stress relaxations. Unusual, nonmonotonous changes of stress with depth could be related to the microstructure of the nitrided zone. A model description of the evolution of the residual stress as function of depth and nitriding time was given. (C) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：1196 / 1208

页数：13

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