Kinematical barriers enhanced dislocation strengthening mechanisms in cold-worked austenitic steels

被引：13

作者：

Zhang, Tian ^{[1
]}

Tang, Jie ^{[1
]}

He, Shudong ^{[1
]}

Jiang, Fulin ^{[1
]}

Fu, Dingfa ^{[1
]}

Teng, Jie ^{[1
]}

Wang, Jian ^{[2
]}

机构：

[1] Hunan Univ, Coll Mat Sci & Engn, Changsha 410082, Peoples R China

[2] Univ Nebraska Lincoln, Mech & Mat Engn, Lincoln, NE 68588 USA

来源：

SCRIPTA MATERIALIA | 2023年 / 226卷

基金：

中国国家自然科学基金;

关键词：

Metal and alloys; Mechanical properties; Dislocation; Twinning; Modeling; DEFORMATION-BEHAVIOR; HARDENING BEHAVIOR; PLASTICITY; EVOLUTION; MICROSTRUCTURE; DUCTILITY; CONTRAST; DENSITY; ALLOYS; TWINS;

D O I：

10.1016/j.scriptamat.2022.115237

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We experimentally investigated microstructure evolution and strengthening behaviors of three cold-worked austenitic steels that deform via dislocations, twinning and stacking faults. The development of stacking faults and twins acting as kinematical barriers for dislocation motion was found to be influenced by stacking fault energy and accumulated dislocations simultaneously, which in turn accelerate dislocation storage rate, strengthen the alloys, and develop high strain hardening rate. We thus proposed a nonadditive strengthening equation to rationalize experimental observation by combining the dislocation-based two-internal-variable model coupled with kinematical barriers.

引用

页数：6

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