文献类型：期刊文献

英文题名：Enhanced strength-ductility synergy in a Cu-based high entropy alloy via severe cold-deformed and annealing treatment

作者：Li, Juan Feng, Kai Zhou, Fugui Qin, Qingdong Yu, Tingxiao Zhao, Honglong Ge, Lin

第一作者：李静

通信作者：Qin, QD[1];Zhao, HL[1]|[14440c17cf7bd1f4ff05e]秦庆东;[144400fa133c5f6c59dc2]秦庆东;

机构：[1]Guizhou Inst Technol, Dept Mat & Energy Engn, Guiyang 550003, Peoples R China;[2]Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai Key Lab Mat Laser Proc & Modificat, Shanghai 200240, Peoples R China;[3]2011 Special Funct Mat Collaborat Innovat Ctr Guiz, Guiyang 550003, Peoples R China

第一机构：贵州理工学院

通信机构：corresponding author), Guizhou Inst Technol, Dept Mat & Energy Engn, Guiyang 550003, Peoples R China.|贵州理工学院;

年份：2025

卷号：39

起止页码：7717-7731

外文期刊名：JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T

收录：;EI(收录号：20254719541841);Scopus(收录号：2-s2.0-105022075625);WOS:【SCI-EXPANDED(收录号:WOS:001623181400001)】；

基金：This work was supported by the Major Science and Technology Special Project of Guizhou Province (Qiankehe Rencai XKBF [2025] 008) , Guizhou Province Natural Science Basic Research Planning Project (Qianke He Jichu MS [2025] 183) , Guizhou Province High Level Innovative Talents (No. Qianke He Platform and Talent (2022) 011-2) , Natural Science Project of Guizhou Provincial Education Department (Qian jiaoji (2023) 078) , Guizhou Provincial Department of Education Hundreds schools and thousands enterprises in science and technology research unveiled the leading projects (Qian Keji [2024] 002) , Guizhou Province Youth Science and Technology Talent Support Project, Guiyang Bauxite deep processing science and technology small yard. The authors would like to thank Dr. Lilin Xie from Center of Electron Microscopies, Institute of Quantum Materials and Physics, Henan Academy of Sciences for supporting of TEM analysis.

语种：英文

外文关键词：Cu-based high entropy alloys; Severe cold deformation; Annealing treatment; Microstructure evolution; Mechanical properties

摘要：The distinctive microstructural properties of high-entropy alloys provide an opportunity to develop alloys with exceptional strength and ductility. As a typical Cu-based high-entropy alloy, the equiatomic CoCrFeNiCu alloy is desirable for aerospace and nuclear applications due to its excellent high-temperature wear resistance and radiation resistance. This study successfully achieved an excellent balance of strength and ductility in the CoCrFeNiCu alloy through severe cold-deformed and subsequent annealing treatment. Mechanical properties were evaluated using tensile testing, while microstructural evolution was systematically characterized via scanning electron microscopy (SEM), electron backscatter diffraction (EBSD), and transmission electron microscopy (TEM). After severe cold deformation, the yield strength and ultimate tensile strength reached 873 MPa and 931 MPa, respectively, representing increases of 3.2 and 2.2 times increase compared to the as-cast alloy. However, the elongation decreased significantly from 35.27 % to 2.12 %. Following annealing treatment at 1110 degrees C for 120 min, elongation increased to 35.98 %. The results showed that the yield strength and ultimate tensile strength were 1.4 and 1.6 times greater than those of the as-cast alloy, accompanied by a slight increase in elongation. The CH-1100 sample exhibited fine equiaxed grains with an average size of approximately 7.3 mu m, and numerous rod-like nano-sized Cu precipitates measuring about 20 nm were observed. The synergistic effects of grain refinement, dislocation strengthening, and precipitation hardening contributed to the simultaneous enhancement of both strength and ductility in the CoCrFeNiCu alloy.