A Novel BCC/B2 Structural Nb_(38)Ti_(35)Al_(15)V_(6)Cr_(4)(TaHfMoW)_(2) Refractory High‑Entropy Alloy with Excellent Specifc Yield Strength‑Plasticity Synergy

作     者：Hongbin Liu Zhenqiang Xing Yitong Yang Jingyu Pang Wen Li Zhengwang Zhu Long Zhang Aimin Wang Haifeng Zhang Hongwei Zhang Hongbin Liu;Zhenqiang Xing;Yitong Yang;Jingyu Pang;Wen Li;Zhengwang Zhu;Long Zhang;Aimin Wang;Haifeng Zhang;Hongwei Zhang

作者机构：School of Materials Science and EngineeringShenyang Ligong UniversityShenyang 110159China Shi-Changxu Innovation Center for Advanced MaterialsInstitute of Metal ResearchChinese Academy of SciencesShenyang 110016China Foshan Sino-Tech Industrial Technology Research InstituteFoshan 528000China School of MetallurgyNortheastern UniversityShenyang 110819China 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报(英文版))

年 卷 期：2025年第38卷第3期

页      面：396-406页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the Chinese Academy of Sciences(ZDBS-LY-JSC023) the National Natural Science Foundation of China(No.52404370) the Natural Science Foundation of Liaoning Province(2023-BS-012) the Youth Innovation Promotion Association CAS(2021188) the IMR Innovation Fund(2023-PY16) the Guangdong Basic and Applied Basic Research Foundation(2023A1515111060) 

主　　题：Refractory high entropy alloy B2 phase Microstructure Mechanical property Deformation mechanism 

摘      要：Refractory high-entropy alloys(RHEAs)stand as promising candidates for the development of a new generation of hightemperature materials due to their exceptional mechanical ***,the inherent low ductility and high density of RHEAs have hindered their widespread adoption in industrial *** this study,an Nb_(38)Ti_(35)Al_(15)V_(6)Cr_(4)(TaHfMoW)_(2) RHEA with a BCC/B2 dual-phase structure is successfully *** RHEA exhibits excellent specifc yield strength of 162.4 MPa·g^(−1)·cm^(3) and 84.3 MPa·g^(−1)·cm^(3) at room temperature(RT)and 800℃,*** was found that the pinning efect of the B2 phase induces a gradual transition in dislocation slip mode from planar slip to cross slip,homogenizing the plastic fow and resulting in excellent compression plasticity(ε50%).Additionally,the B2 phase endows the alloy with excellent yield strength at high temperatures by precipitation ***,the dominated a/2type dislocation contributes to the alloy s superior plasticity at high temperatures.