A new strategy of tailoring strength and ductility of CoCrFeNi based high-entropy alloy

被引：69

作者：

Zheng, Fukai ^{[1
,2
]}

Zhang, Guannan ^{[3
]}

Chen, Xiujuan ^{[1
,2
]}

Yang, Xiao ^{[3
]}

Yang, Zengchao ^{[3
]}

Li, Yong ^{[3
]}

Li, Jiangtao ^{[3
]}

机构：

[1] Lanzhou Univ Technol, Coll Mat Sci & Engn, Lanzhou 730050, Peoples R China

[2] Lanzhou Univ Technol, Coll Mechanoelect Engn, Lanzhou 730050, Peoples R China

[3] Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Cryogen, Beijing 100190, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2020年 / 774卷

基金：

中国国家自然科学基金;

关键词：

High entropy alloy; Precipitation strengthening; Mechanical properties; Coherent precipitation; SOLID-SOLUTION; MECHANICAL-PROPERTIES; PRECIPITATION; BEHAVIOR;

D O I：

10.1016/j.msea.2020.138940

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this paper, a new strategy of high entropy alloy is presented, high strength and promising ductility are realized by precipitation strengthening mechanism. The structure of nano-L1(2) precipitates on the FCC high entropy alloy (HEA) matrix is formed, by adding Ni and Al with a fixed stoichiometric ratio (keeping Ni: Al = 3:1, Ni3Al) to CoCrFeNi matrix. The study found that the mechanical properties of the alloy can be effectively controlled by optimizing the addition of Ni3Al content. Through tension test and theoretical analysis, we found that, when the addition of Ni3Al reaches 0.75, the HEA exhibits the excellent comprehensive strength and ductility. With the tensile fracture strength, yield strength and elongation are 1200 MPa, 910 MPa, and 14%, respectively. Compared with the CoCrFeNi high entropy alloy without precipitates, the yield strength is increased by three times. TEM analysis and theoretical calculation show that the strengthening mechanism of the second phase is the main factor to improve the properties.

引用

页数：6

共 50 条

[1] Tailoring strength and ductility of high-entropy CrMnFeCoNi alloy by adding Al
Xian, Xin
Zhong, Zhi-Hong
Lin, Li-Jing
Zhu, Zhi-Xiong
Chen, Chang
Wu, Yu-Cheng
RARE METALS, 2022, 41 (03) : 1015 - 1021
[2] Tailoring strength and ductility of high-entropy CrMnFeCoNi alloy by adding Al
Xin Xian
Zhi-Hong Zhong
Li-Jing Lin
Zhi-Xiong Zhu
Chang Chen
Yu-Cheng Wu
Rare Metals, 2022, 41 : 1015 - 1021
[3] Tailoring strength and ductility of high-entropy CrMnFeCoNi alloy by adding Al
Xin Xian
Zhi-Hong Zhong
Li-Jing Lin
Zhi-Xiong Zhu
Chang Chen
Yu-Cheng Wu
RareMetals, 2022, 41 (03) : 1015 - 1021
[4] High-entropy Al0.3CoCrFeNi alloy fibers with high tensile strength and ductility at ambient and cryogenic temperatures
Li, Dongyue
Li, Chengxin
Feng, Tao
Zhang, Yidong
Sha, Gang
Lewandowski, John J.
Liaw, Peter K.
Zhang, Yong
ACTA MATERIALIA, 2017, 123 : 285 - 294
[5] Tailoring heterogeneities in high-entropy alloys to promote strength–ductility synergy
Evan Ma
Xiaolei Wu
Nature Communications, 10
[6] Tailoring the strength and ductility of Al0.25CoCrFeNi high entropy alloy through cryo-rolling and annealing
Liu, Min
Zhang, Shidong
Li, Fangjie
Luo, Yun
Yao, Yilin
Zhang, Haochen
Wang, Zemin
Wang, Lianbo
Wang, Zhanyong
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2021, 826
[7] Hydrogen enhances strength and ductility of an equiatomic high-entropy alloy
Luo, Hong
Li, Zhiming
Raabe, Dierk
SCIENTIFIC REPORTS, 2017, 7
[8] Hydrogen enhances strength and ductility of an equiatomic high-entropy alloy
Hong Luo
Zhiming Li
Dierk Raabe
Scientific Reports, 7
[9] Sublattice formation in CoCrFeNi high-entropy alloy
Meshkov, E. A.
Novoselov, I. I.
Shapeev, A., V
Yanilkin, A., V
INTERMETALLICS, 2019, 112
[10] Metallurgical Processing of CoCrFeNi High-Entropy Alloy
Müller, P.
Zadera, A.
Čamek, L.
Myška, M.
Pernica, V.
Archives of Foundry Engineering, 2024, 24 (04)

← 1 2 3 4 5 →