Significance of interplay between austenite stability and deformation mechanisms in governing three-stage work hardening behavior of phase-reversion induced nanograined/ultrafine-grained (NG/UFG) stainless steels with high strength-high ductility combination

被引：103
作者：
Challa, V. S. A. [1 ]
Wan, X. L. [1 ]
Somani, M. C. [2 ]
Karjalainen, L. P. [2 ]
Misra, R. D. K. [1 ]
机构：
[1] Univ Louisiana Lafayette, Ctr Struct & Funct Mat, Lab Excellence Adv Steel Res, Lafayette, LA 70504 USA
[2] Univ Oulu, Dept Mech Engn, Oulu 90014, Finland
来源：
SCRIPTA MATERIALIA | 2014年 / 86卷
关键词：
Metastable austenitic stainless steel; Deformation mechanism; Austenite stability; Grain size; TRANSFORMATION-INDUCED PLASTICITY; SIZE; METALS; NANOCRYSTALLINE; MICROSTRUCTURES; FORMABILITY; MN; TI;
D O I：
10.1016/j.scriptamat.2014.05.010
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In the context of obtaining high strength-high ductility combination in nanograined/ultrafine-grained austenitic stainless steels, we underscore the dependence of grain structure and deformation mechanism. In high strength nanograined/ultrafine-grained steel, deformation twinning contributed to the excellent ductility and high strain hardening rate, while in the low strength coarse-grained steel, ductility and strain hardening ability was also good, but due to strain-induced martensite. The change in deformation mechanism with grain size is attributed to austenite stability-strain energy relationship. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：60 / 63
页数：4
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