Mechanical Relaxation of a Ti36.2Zr30.3Cu8.3Fe4Be21.2 Bulk Metallic Glass: Experiments and Theoretical Analysis

作     者：J.C.Qiao Y.H.Chen G.J.Lyu K.K.Song J.M.Pelletier Y.Yao 

作者机构：School of MechanicsCivil Engineering and ArchitectureNorthwestern Polytechnical UniversityXi'an 710072China School of MechanicalElectrical and Information EngineeringShandong University(Weihai)Weihai 264209China MATEISUMR CNRS5510Bat.B.PascalINSA-LyonUniversite de Lyon69621 Villeurbanne CedexFrance 

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

年 卷 期：2019年第32卷第6期

页      面：726-732页

核心收录：

学科分类：08[工学] 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 (Nos. 51611130120, 11772257, 11572249, 51871132) supported by the Fundamental Research Funds for the Central Universities (Nos. 3102018ZY010, 3102017HQZZ012) 

主　　题：Metallic glasses Mechanical relaxation Physical aging Quasi-point defects 

摘      要：The dynamic mechanical relaxation behavior of Ti36.2Zr30.3Cu8.3Fe4Be21.2 bulk metallic glass with good glass-forming ability was investigated by mechanical *** mechanical relaxation behavior was analyzed in the framework of quasi-point defects *** experimental results demonstrate that the atomic mobility of the metallic glass is closely associated with the correlation factorχ.The physical aging below the glass transition temperature T g shows a non-Debye relaxation behavior,which could be well described by stretched Kohlrausch exponential *** Kohlrausch exponentβaging reflects the dynamic heterogeneities of the metallic *** concentration ofdefectsand atomic mobility decrease caused by the in situ successive heating during the mechanical spectroscopy experiments.