Influence of chemical composition on mechanical properties and energy absorption of CoNiFeCr high entropy alloys: A first-principles study

被引：3

作者：

Lin, Huilong ^{[1
]}

Tong, Muyun ^{[1
]}

Wang, Hao ^{[1
]}

Lu, Nan ^{[1
]}

Fang, Qihong ^{[1
]}

Li, Jia ^{[1
]}

机构：

[1] Hunan Univ, Coll Mech & Vehicle Engn, State Key Lab Adv Design & Mfg Vehicle Body, Changsha 410082, Peoples R China

来源：

PHYSICA B-CONDENSED MATTER | 2022年 / 640卷

基金：

中国国家自然科学基金;

关键词：

High entropy alloy; Strength; Ductility; Energy absorption capacity; First-principal calculations; STACKING-FAULT ENERGIES; THIN-WALLED TUBES; CONSTITUENT ELEMENTS; TI-6AL-4V ALLOY; COCRFENI; CAPABILITY; TRANSFORMATION; DEFORMATION; PLASTICITY; EVOLUTION;

D O I：

10.1016/j.physb.2022.414029

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Metal matrix for the impact protection often requires high strength and good ductility as well as large energy absorption capacity. However, the traditional metal matrix alloys show relatively low strength and ductility to limit the energy absorption capacity. Here, the effect of chemical composition on properties of CoxNi50-xFe25Cr25 high entropy alloys is studied using first-principal calculations. The integrated method considering the competitive relationship between the strength and ductility is proposed to evaluate the energy absorption capacity. The results show that CoNiFeCr HEA with high strength and good ductility exhibits the exceptional energy absorption capacity, where the specific strength and ductility are 889 kN m/kg and 0.99. This work gives a new light into the selection and evaluation of strong energy-absorbing alloys.

引用

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