Mechanism of huge Luders-type deformation in ultrafine grained austenitic stainless steel

被引：105
|
作者：
Gao, Si [1 ]
Bai, Yu [1 ]
Zheng, Ruixiao [1 ]
Tian, Yanzhong [2 ]
Mao, Wenqi [1 ]
Shibata, Akinobu [1 ,3 ]
Tsuji, Nobuhiro [1 ,3 ]
机构：
[1] Kyoto Univ, Dept Mat Sci & Engn, Sakyo Ku, Yoshida Honmachi, Kyoto 6068501, Japan
[2] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China
[3] Kyoto Univ, ESISM, Sakyo Ku, Yoshida Honmachi, Kyoto 6068501, Japan
来源：
SCRIPTA MATERIALIA | 2019年 / 159卷
关键词：
Yield point; Luders band; Plastic instability; Deformation induced martensitic transformation; Austenitic stainless steel; Ultra-fine grains; SEVERE PLASTIC-DEFORMATION; HIGH DUCTILITY; MARTENSITIC-TRANSFORMATION; ANNEALING BEHAVIOR; NANO-CRYSTALLINE; HIGH-STRENGTH; MICROSTRUCTURE; COLD; STABILITY; TENSILE;
D O I：
10.1016/j.scriptamat.2018.09.007
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A remarkable Luders-type localized deformation having a huge Luders strain of 0.4 was observed in tensile deformation of an ultra-fine grained austenitic stainless steel fabricated by two-step cold rolling and annealing processes. It was clarified that the Luders-type deformation in the material was essentially the same as necking caused by plastic instability, but the enhanced strain hardening by deformation induced martensitic transformation realized the stable propagation of the strain localized band, leading to the huge Luders strain as well as high strength and large ductility of the material. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：28 / 32
页数：5
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