Superior Mechanical Properties of AlCoCrFeNiTix High-Entropy Alloys upon Dynamic Loading

被引：39

作者：

Jiao, Z. M. ^{[1
]}

Ma, S. G. ^{[1
]}

Chu, M. Y. ^{[2
]}

Yang, H. J. ^{[2
]}

Wang, Z. H. ^{[1
]}

Zhang, Y. ^{[3
]}

Qiao, J. W. ^{[1
,2
]}

机构：

[1] Taiyuan Univ Technol, Inst Appl Mech & Biomed Engn, Shanxi Key Lab Mat Strength & Struct Impact, Taiyuan 030024, Peoples R China

[2] Taiyuan Univ Technol, Coll Mat Sci & Engn, Lab Appl Phys & Mech Adv Mat, Taiyuan 030024, Peoples R China

[3] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

来源：

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2016年 / 25卷 / 02期

基金：

美国国家科学基金会; 中国国家自然科学基金;

关键词：

constitutive equation; dynamic loading; high-entropy alloys; mechanical properties; BULK-METALLIC-GLASS; STRAIN-RATE; COMPRESSIVE BEHAVIOR; DEFORMATION-BEHAVIOR; MATRIX COMPOSITE; MICROSTRUCTURE; FRACTURE; RATES; TEMPERATURE; RANGE;

D O I：

10.1007/s11665-015-1869-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High-entropy alloys with composition of AlCoCrFeNiTi (x: molar ratio; x = 0, 0.2, 0.4) under quasi-static and dynamic compression exhibit excellent mechanical properties. A positive strain-rate sensitivity of yield strength and the strong work-hardening behavior during plastic flows dominate upon dynamic loading in the present alloy system. The constitutive relationships are extracted to model flow behaviors by employing the Johnson-Cook constitutive model. Upon dynamic loading, the ultimate strength and fracture strain of AlCoCrFeNiTix alloys are superior to most of bulk metallic glasses and in situ metallic glass matrix composites.

引用

页码：451 / 456

页数：6

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