Dynamic mechanical relaxation and thermal creep of high-entropy La_(30)Ce_(30)Ni_(10)Al_(20)Co_(10)bulk metallic glass

作     者：LangTing Zhang YaJuan Duan Daniel Crespo Eloi Pineda YunJiang Wang Jean-Marc Pelletier JiChao Qiao LangTing Zhang;YaJuan Duan;Daniel Crespo;Eloi Pineda;YunJiang Wang;Jean-Marc Pelletier;JiChao Qiao

作者机构：School of MechanicsCivil Engineering and ArchitectureNorthwestern Polytechnical UniversityXi’an 710072China Department of PhysicsBarcelona Research Center in Multiscale Science and TechnologyInstitute of Energy TechnologiesUniversitat Politècnica de CatalunyaBarcelona 08019Spain State Key Laboratory of Nonlinear MechanicsInstitute of MechanicsChinese Academy of SciencesBeijing 100190China School of Engineering ScienceUniversity of Chinese Academy of SciencesBeijing 101408China MATEISUMR CNRS5510Universitéde LyonINSA-LyonVilleurbanne Cedex F-69621 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2021年第64卷第9期

页      面：93-103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 National Natural Science Foundation of China (Grant No. 51971178) the Natural Science Basic Research Plan for Distinguished Young Scholars in Shaanxi Province (Grant No. 2021JC-12) financial support from MICINN(Grant No. FIS2017-82625-P) Generalitat de Catalunya (Grant No.2017SGR0042)the Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University(Grant No. CX2021015) financially supported by the National Natural Science Foundation of China (Grant No. 12072344) 

主　　题：high-entropy bulk metallic glass mechanical relaxation creep recovery process shear transformation zone structural heterogeneity 

摘      要：Dynamic mechanical relaxation is a fundamental tool to understand the mechanical and physical properties of viscoelastic materials like *** spectroscopy shows that the high-entropy bulk metallic glass(La_(30)Ce_(30)Ni_(10)Al_(20)Co_(10))exhibits a distinctβ-relaxation *** the present research,dynamic mechanical analysis and thermal creep were performed using this bulk metallic glass material at a temperature domain around theβ*** components of total strain,including ideal elastic strain,anelastic strain,and viscous-plastic strain,were analyzed based on the model of shear transformation zones(STZs).The stochastic activation of STZ contributes to the anelastic *** the temperature or external stress is high enough or the timescale is long enough,the interaction between STZs induces viscous-plastic *** all the spectrum of STZs is activated,the quasi-steady-state creep is achieved.