Tensile ductility and deformation mechanisms of a nanotwinned 316L austenitic stainless steel

被引：17
|
作者：
Zhang, Y. Z. [1 ,2 ]
Wang, J. J. [1 ,3 ]
Tao, N. R. [1 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2020年 / 36卷
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
Nanotwinned; Stainless steel; Ductility; Deformation mechanism; COHERENT TWIN BOUNDARIES; STRAIN-RATE; INDUCED TRANSFORMATION; DISLOCATIONS; STRENGTH; MARTENSITE; EVOLUTION; GRAINS; COPPER; STATE;
D O I：
10.1016/j.jmst.2019.02.008
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A nanotwinned 316L austenitic stainless steel was prepared by means of surface mechanical grinding treatment. After recovery annealing, the density of dislocations decreases obviously while the average twin/matrix lamella thickness still keeps in the nanometer scale. The annealed nanotwinned sample exhibits a high tensile yield strength of 771 MPa and a considerate uniform elongation of 8%. TEM observations showed that accommodating more dislocations and secondary twinning inside the nanotwins contribute to the enhanced ductility and work hardening rate of the annealed nanotwinned sample. (C) 2019 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
引用
收藏
页码：65 / 69
页数：5
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