Contribution of deformation mechanisms to strength and ductility in two Cr-Mn grade austenitic stainless steels

被引：90
作者：
Hamada, A. S. [1 ,2 ]
Karjalainen, L. P. [1 ]
Misra, R. D. K. [3 ,4 ]
Talonen, J. [5 ]
机构：
[1] Univ Oulu, Mat Engn Lab, Oulu 90014, Finland
[2] Suez Canal Univ, Met & Mat Engn Dept, Fac Petr & Min Engn, Suez, Egypt
[3] Univ Louisiana Lafayette, Ctr Struct & Funct Mat, Lafayette, LA 70504 USA
[4] Univ Louisiana Lafayette, Dept Chem Engn, Lafayette, LA 70504 USA
[5] Outokumpu Oyj, FI-02201 Espoo, Finland
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2013年 / 559卷
关键词：
High Mn-Cr austenitic stainless steel; Deformation twinning; Martensitic transformation; Mechanical properties; STACKING-FAULT ENERGY; STRAIN-INDUCED MARTENSITE; TWIP STEELS; TRANSFORMATION; NITROGEN; BEHAVIOR; ALLOYS; TEMPERATURE;
D O I：
10.1016/j.msea.2012.08.108
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The role of different deformation mechanisms in controlling mechanical properties were studied in two low-Ni, Cr-Mn austenitic stainless steel grades (Types 201 and 201L) by tensile testing and microstructure examinations. Tensile tests were carried out at two different strain rates, 5 x 10(-4) and 10(-2) s(-1), in the temperature range from -80 degrees C to 200 degrees C. It was observed that the flow properties and work hardening rate are affected significantly by temperature and strain rate for the concerned steels through variation of deformation mechanism. Deformation-induced austenite-to-martensite transformation (TRIP effect) is the dominant mechanism at temperatures below room temperature. From 50 degrees C up to 200 degrees C, plastic deformation is controlled by mechanical twinning (TWIP effect) and dislocation glide. The electron backscattered diffraction (EBSD) technique and transmission electron microscopy (TEM) were employed to study the plastic deformation accommodation and identify the primary deformation mechanisms operating in the deformed steels. (C) 2012 Elsevier B.V. All rights reserved.
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收藏
页码：336 / 344
页数：9
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