Nitrogen diffusion and stresses during expanded austenite formation in nitriding

被引：0
|
作者：
Tkacz-Smiech K. [1 ]
Wierzba B. [2 ]
Bozek B. [1 ]
Danielewski M. [1 ]
机构：
[1] AGH University of Science and Technology, Mickiewicza 30, Kraków
[2] Rzeszow University of Technology, Rzeszów
来源：
Defect and Diffusion Forum | 2016年 / 371卷
关键词：
Bi-velocity; Expanded austenite; Interdiffusion; Nitriding; Stresses;
D O I：
10.4028/www.scientific.net/DDF.371.49
中图分类号：
学科分类号：
摘要：
Low-temperature nitriding of austenitic stainless steels or chromium containing alloys can produce expanded austenite, known as S-phase, with combined improvement in wear and corrosion resistance. In the paper a critical review of various models for nitrogen diffusion during nitriding is presented. A special attention is paid to the expanded austenite growth. A new model based on bi-velocity method and including stresses is presented. Basic equations and boundary conditions are discussed. Composition dependent nitrogen diffusion coefficient is assumed. Numerical solutions are obtained for the growth of the S-phase layer in steel. The results are compared with previous experiment and calculations. © 2016 Trans Tech Publications, Switzerland.
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页码：49 / 58
页数：9
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