文献类型：期刊文献

英文题名：Microstructure, mechanical properties and incipient plasticity of (Ti_42.5Zr_42.5Nb₁₀Ta₅)_100-xMo_x refractory high-entropy alloys

作者：Qin, Jiaqing Yi, Yanliang Long, Shaolei Ling, Min Zhong, Liqiong Jin, Fengshuo Han, Juan Lai, Weiji

第一作者：Qin, Jiaqing

通信作者：Lai, WJ[1];Yi, YL[2];Long, SL[3]

机构：[1]Jinan Univ, Affiliated Hosp 5, Heyuan Shenhe Peoples Hosp, Guandgong Prov Key Lab Spine & Spinal Cord Reconst, Heyuan 517000, Peoples R China;[2]Jinan Univ, Inst Adv Wear & Corros Resistant & Funct Mat, Guangzhou 510632, Guangdong, Peoples R China;[3]Jinan Univ, Shaoguan Res Inst, Shaoguan 512027, Guangdong, Peoples R China;[4]Guizhou Inst Technol, Sch Mech Engn, Guiyang 550003, Guizhou, Peoples R China;[5]Guiyang Univ, Coll Mech Engn, Guiyang 550005, Guizhou, Peoples R China

第一机构：Jinan Univ, Affiliated Hosp 5, Heyuan Shenhe Peoples Hosp, Guandgong Prov Key Lab Spine & Spinal Cord Reconst, Heyuan 517000, Peoples R China

通信机构：corresponding author), Jinan Univ, Affiliated Hosp 5, Heyuan Shenhe Peoples Hosp, Guandgong Prov Key Lab Spine & Spinal Cord Reconst, Heyuan 517000, Peoples R China;corresponding author), Jinan Univ, Inst Adv Wear & Corros Resistant & Funct Mat, Guangzhou 510632, Guangdong, Peoples R China;corresponding author), Guizhou Inst Technol, Sch Mech Engn, Guiyang 550003, Guizhou, Peoples R China.|贵州理工学院机械工程学院;贵州理工学院;

年份：2024

卷号：30

起止页码：8128-8136

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

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001247177900001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (Grant No. 52005217) , University Research Platform and Research Projects of Guangdong Education Department (2022ZDZX3003) , Guangdong Basic and Applied Basic Research Foundation (2024A1515012353 and 2023A1515220021) , Guangzhou Science and technology planning project (2024A04J4063) , and Natural Science Foundation of Guizhou Province of China (Grant Nos. ZK [2024] General 516 and 522) .

语种：英文

外文关键词：Refractory high-entropy alloy; Microstructure; Mechanical properties; Nanoindentation

摘要：A series of (Ti42.5Zr42.5Nb10Ta5)(100-x)Mo-x (x = 0, 3, 5 and 7 at.%) refractory high-entropy alloys (RHEAs) were prepared, and the influence of Mo content on microstructure and mechanical properties of the RHEAs were systematically studied. All the RHEAs consist of a single body-centered cubic (BCC) phase. As the Mo content increases from 0 at.% to 7 at.%, the yield strength of RHEAs increases from 670 MPa to 975 MPa at room temperature. The high strength of the BCC RHEAs mainly depends on solid-solution strengthening caused by the Mo addition. The RHEAs with low Mo content (0-5 at.%) can possess high tensile plasticity of similar to 20 %, while it reflects brittle after the 7 at.% Mo addition. The high tensile plasticity of the RHEAs was attributed to the combined effects of lattice rotation to promote and refine crystalline strengthening. The RHEAs with 5 at.% Mo addition have high specific yield strength (similar to 32 MPa g(-1)cm(3)) and excellent fracture strains (> 60 %) at 1173 K. Moreover, the incipient plasticity of the RHEAs was analyzed by nanoindentation. It is shown that the maximum shear stress (tau(max)) of the RHEAs from 1.80-2.34 GPa to 2.67-4.83 GPa. The activation volumes (v & lowast;) of the RHEAs from 0.7 Omega to 1.1 Omega. The nanomechanical properties of the RHEAs are related to the Mo content. The purpose of this work is to design RHEAs with excellent mechanical properties and to offer a theoretical foundation to assist new RHEA design.