Dynamic deformation behaviors and constitutive relations of an AlCoCr1.5Fe1.5NiTi0.5 high-entropy alloy

被引：81
作者：
Zhang, T. W. [1 ,2 ]
Jiao, Z. M. [1 ,2 ]
Wang, Z. H. [1 ,2 ]
Qiao, J. W. [3 ]
机构：
[1] Taiyuan Univ Technol, Inst Appl Mech & Biomed Engn, Taiyuan 030024, Peoples R China
[2] Taiyuan Univ Technol, Shanxi Key Lab Mat Strength & Struct Impact, Taiyuan 030024, Peoples R China
[3] Taiyuan Univ Technol, Coll Mat Sci & Engn, Taiyuan 030024, Peoples R China
来源：
SCRIPTA MATERIALIA | 2017年 / 136卷
基金：
中国国家自然科学基金;
关键词：
High entropy alloy; Mechanical properties; Dynamic loadings; Strain rate sensitivity; HIGH-SPEED DISLOCATIONS; STRAIN-RATE; SOLID-SOLUTION; MECHANICAL-PROPERTIES; MICROSTRUCTURE; FLOW;
D O I：
10.1016/j.scriptamat.2017.03.039
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A new high-entropy alloy, AlCoCr1.5Fe1.5NiTi0.5, with dual-phase body-centered cubic structure, exhibits excellent compression strength and large plasticity upon quasi-static and dynamic loadings. Positive strain-rate sensitivity on the yielding strength is available, and the work-hardening behavior weakens with increasing the strain rates due to the adiabatic heating effect upon dynamic loadings. Considering the adiabatic temperature rise converted by plastic deformation work at high strain rates, the flow behavior is characterized by employing the modified Johnson-Cook model. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：15 / 19
页数：5
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