Investigation of the effect of grain size on the strain-induced martensitic transformation in a high-Mn stainless steel using nanoindentation

被引：20
作者：
Sadeghpour, S. [1 ]
Kermanpur, A. [1 ]
Najafizadeh, A. [2 ]
机构：
[1] Isfahan Univ Technol, Dept Mat Engn, Esfahan 8415683111, Iran
[2] Fould Inst Technol, Fouldshar, Isfahan, Iran
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2014年 / 612卷
关键词：
Nanocrystalline microstructure; Nanoindentation; Strain-induced martensite; Phase transformations; Stainless steels; DEFORMATION PROCESSES; REVERSION;
D O I：
10.1016/j.msea.2014.06.055
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The formation of strain-induced martensite (SIM) during nanoindentation experiments was investigated in a Ti-bearing high-Mn stainless steel with three different grain sizes, e.g. coarse-grained, ultrafine-grained and nano-grained structures. In the nanoindentation load-displacement curves, there was clear distinction in the number of pop-ins from five in the coarse-grained structure to one in the nano-grained structure representing the difference in the susceptibility to formation of SIM. It was found that grain refining down to the nano scale leads to a significant restriction in the formation of SIM. This can be attributed to the increased stability of austenite as a result of increase in the stacking fault energy by reducing grain size. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：214 / 216
页数：3
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