Work-Hardening Mechanism in High-Nitrogen Austenitic Stainless Steel

被引：30
|
作者：
Masumura, Takuro [1 ,2 ]
Seto, Yuki [2 ,3 ,5 ]
Tsuchiyama, Toshihiro [1 ,3 ,5 ]
Kimura, Ken [4 ]
机构：
[1] Kyushu Univ, Res Ctr Steel, Fukuoka 8190395, Japan
[2] Kyushu Univ, Grad Sch Engn, Fukuoka 8190395, Japan
[3] Kyushu Univ, Dept Mat Sci & Engn, Fukuoka 8190395, Japan
[4] Nippon Steel Corp Ltd, Steel Res Labs, Titanium & Stainless Steel Res Lab, Chiba 2938511, Japan
[5] Kyushu Univ, Fukuoka, Japan
来源：
MATERIALS TRANSACTIONS | 2020年 / 61卷 / 04期
关键词：
austenitic stainless steel; dislocation density; planar dislocation array; nitrogen; mWH/WA method; SHORT-RANGE ORDER; CARBON; MICROSTRUCTURE; DEFORMATION; DIFFERENCE; BEHAVIOR; STRAINS; ENERGY;
D O I：
10.2320/matertrans.H-M2020804
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The remarkably high work-hardening rate in high-nitrogen austenitic stainless steels is generally believed to be due to the promotion of dislocation accumulation by nitrogen addition. However, analysis of dislocation accumulation behavior by the modified Williamson-Hall/Warren-Averbach method reveals that no difference to the increment of the dislocation density during deformation exists between austenitic steels with and without nitrogen. Since cross slipping is markedly suppressed in high-nitrogen steels, the moving dislocations are back-stressed by the planar dislocation arrays. This induces the deformation resistance and the high work-hardening rate.
引用
收藏
页码：678 / 684
页数：7
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