Effects of strain rate on mechanical properties of heterogeneous nano-structured SUS316LN stainless steel: Revealed by in-situ X-ray diffraction at synchrotron radiation facility

被引：0

作者：

Jiang, Hua ^{[1
]}

Watanabe, Chihiro ^{[2
]}

Miyajima, Yoji ^{[2
]}

Koga, Norimitsu ^{[2
]}

Aoyagi, Yoshiteru ^{[3
]}

Kobayashi, Masakazu ^{[4
]}

Miura, Hiromi ^{[4
]}

机构：

[1] Kanazawa Univ, Grad Sch Nat Sci & Technol, Kakuma Machi, Kanazawa, Ishikawa 9201192, Japan

[2] Kanazawa Univ, Div Mech Sci & Engn, Kakuma Machi, Kanazawa, Ishikawa 9201192, Japan

[3] Tohoku Univ, Dept Finemech, Aoba Ku, 6-6-01 Aramaki, Sendai, Miyagi 9808576, Japan

[4] Toyohashi Univ Technol, Dept Mech Engn, 1-1 Hibarigaoka,Tempaku Cho, Toyohashi, Aichi 4418580, Japan

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2021年 / 815卷

基金：

日本科学技术振兴机构;

关键词：

Heterogeneous nano-structure; SUS316LN stainless steel; In-situ X-ray measurement; Dislocation density; Mechanical twin; Synchrotron radiation; DISLOCATION DENSITY; COLD-WORK; DEFORMATION; TEMPERATURE; MICROSTRUCTURE; STRENGTH; ANISOTROPY; CRYSTALS; COPPER; MODEL;

D O I：

10.1016/j.msea.2021.141221

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A SUS316LN austenitic stainless steel was heavily cold rolled to develop heterogeneous nano (HN)-structure. And the effects of strain rate on the tensile deformation behavior of the HN-structured SUS316LN stainless steel were investigated. For this purpose, changes in lattice defect densities, such as dislocation density and stacking fault probability, during the tensile tests were investigated by means of in-situ X-ray diffraction (XRD) measurements at a synchrotron facility. The strength and elongation to failure simultaneously increased with increasing applied strain rate. The analyses of XRD profiles and microstructural observation revealed that twin fault probability as well as dislocation density and stacking fault probability increased with increasing strain rate. The more enhanced formation of ultra-fine twins by the increase in strain rate led to higher work hardening and resulted in more excellent strength/ductility balance.

引用

页数：8

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