In-situ formed heterogeneous grain structure in spark-plasma-sintered CoCrFeMnNi high-entropy alloy overcomes the strength-ductility trade-off

Jiang, Feilong1,2; Zhao, Cancan1; Liang, Dingshan1,3; Zhu, Weiwei1,4; Zhang, Yiwen1; Pan, Shuai1,2; Ren, Fuzeng1

2020

10.1016/j.msea.2019.138625

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING   影响因子和分区

0921-5093

1873-4936

The conflict between strength and ductility has been a longstanding dilemma for metallic alloys. Herein, we present a facile strategy to overcome the strength-ductility trade-off of face-center-cubic high-entropy alloys (HEAs) via the in-situ formation of heterogeneous grain structure, using the high local temperature gradients generated during spark plasma sintering coupled with the ‘sluggish diffusion’ of HEAs. The fabricated CoCrFeMnNi HEA has a heterogeneous structure over a large range of grain size from 140 nm to 5 μm, which enables a gigapascal yield strength and a uniform elongation of 9.5%. The mechanism responsible for the associated mechanical properties was analyzed.
© 2019 Elsevier B.V.

Heterogeneous grain structure High-entropy alloy Mechanical properties

EI ; SCI

英语

第一 ; 通讯

Shenzhen Fundamental Research and Discipline Layout project[]

Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:000503324700048

Elsevier Ltd

20194807739771

Chromium alloys ; Cobalt alloys ; Ductility ; Economic and social effects ; Entropy ; Grain size and shape ; Iron alloys ; Manganese alloys ; Mechanical properties ; Spark plasma sintering

Chromium and Alloys:543.1 ; Manganese and Alloys:543.2 ; Iron Alloys:545.2 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Thermodynamics:641.1 ; Materials Science:951 ; Social Sciences:971

MATERIALS SCIENCE

EV Compendex

1.Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, China
2.School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, China
3.Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
4.Institute of Applied Physics and Materials Engineering, Faculty of Science & Technology, University of Macau, Macau, China

Jiang, Feilong,Zhao, Cancan,Liang, Dingshan,et al. In-situ formed heterogeneous grain structure in spark-plasma-sintered CoCrFeMnNi high-entropy alloy overcomes the strength-ductility trade-off[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2020,771.

Jiang, Feilong.,Zhao, Cancan.,Liang, Dingshan.,Zhu, Weiwei.,Zhang, Yiwen.,...&Ren, Fuzeng.(2020).In-situ formed heterogeneous grain structure in spark-plasma-sintered CoCrFeMnNi high-entropy alloy overcomes the strength-ductility trade-off.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,771.

Jiang, Feilong,et al."In-situ formed heterogeneous grain structure in spark-plasma-sintered CoCrFeMnNi high-entropy alloy overcomes the strength-ductility trade-off".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 771(2020).