文献类型：期刊文献

英文题名：Effect of Al/Ti ratio on the microstructure, texture and incipient plasticity of (CoNiCr0.5)95AlxTiy high entropy alloys

作者：Jiang, Hongwan Lu, Yafang An, Xulong Qin, Jiaqing Xie, Tianjin Jin, Fengshuo Zhou, Shengfeng Li, Wei Long, Shaolei Yi, Yanliang

第一作者：蒋宏婉

通信作者：Long, SL[1];Yi, YL[2]

机构：[1]Guizhou Inst Technol, Sch Mech Engn, Guiyang 550003, Peoples R China;[2]Shenzhen Zhongyi United Intellectual Property Agcy, Shenzhen 518027, Peoples R China;[3]Changzhou Univ, Sch Mat Sci & Engn, Changzhou 213164, Peoples R China;[4]Jinan Univ, Inst Adv Wear & Corros Resistant & Funct Mat, Guangzhou 510632, Guangdong, Peoples R China;[5]Jinan Univ, Shaoguan Res Inst, 168 Muxi Ave, Shaoguan 512027, Peoples R China

第一机构：贵州理工学院机械工程学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Mech Engn, Guiyang 550003, Peoples R China;corresponding author), Jinan Univ, Inst Adv Wear & Corros Resistant & Funct Mat, Guangzhou 510632, Guangdong, Peoples R China.|贵州理工学院机械工程学院;贵州理工学院;

年份：2023

卷号：866

外文期刊名：MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

收录：;EI(收录号：20230613549054);Scopus(收录号：2-s2.0-85147249898);WOS:【SCI-EXPANDED(收录号:WOS:000978764700001)】；

基金：National Natural Science Foundation of China (No.52005118), Science and Technology Plan Project of Guizhou Province (QKHJC-ZK [2022]ZD026), Young Scientific Technical Talents Development Fund of Guizhou Province (QJHKYC[2022]359), High-level Talents Research Initiation Fund of Guizhou Institute of Technology (No.2019066), and Basic and Applied Basic Research Fund Project of Guangdong Province in China (2021A1515010523, 2020A1515110020 and 2022A1515010091).

语种：英文

外文关键词：High entropy alloy; Texture; Mechanical property; Incipient plasticity

摘要：To analyze the incipient plasticity and then optimize the micromechanical behavior of HEAs, the FCC (CoN-iCr0.5)95AlxTiy (x = 1, 3, 4 and y = 4, 2,1 (at.%)) HEAs were selected and thermomechanical processed, and corresponding microstructure, mechanical property and incipient plasticity were investigated and discussed. As the Al/Ti ratio changes from 1/4 to 4/1, the average GND of HEAs decreases from 1.11 x 1014 m- 2 to 1.05 x 1014 m- 2, and the contents of the A {110} <111> and CopperTwin {552} <115> reach to 11% and 4.4%, respectively. Meanwhile, the ductility of HEA increases from 10.6% to 13.9% with the increased Al/Ti ratio, while the strength decreases from 1221.1 MPa to 910.3 MPa. Nanoindentation results show that the normalized maximum stress tau max/mu of the HEAs exhibit the value of (1/18-1/12)mu, and the average activation volume v*are calculated to be 3.2-3.4 omega. These indicate that the incipient plasticity of (CoNiCr0.5)95AlxTiy possesses hetero-geneous dislocation nucleation triggered by cooperative migration of multiple atoms via vacancies.