Novel Crystallization Behaviors of Zr-Based Metallic Glass Under Thermo-Mechanical Coupled Fatigue Loading Condition

作     者：Zhi-Chao Ma Xiao-Xi Ma Hong-Wei Zhao Fu Zhang Li-Ming Zhou Lu-Quan Ren 

作者机构：School of Mechanical and Aerospace Engineering Jilin University Changchun 130025 China Key Laboratory of Bionic Engineering Ministry of EducationJilin University Changchun 130025. China 

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

年 卷 期：2019年第32卷第7期

页      面：797-802页

核心收录：

学科分类：0817[工学-化学工程与技术] 0806[工学-冶金工程] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0703[理学-化学] 0811[工学-控制科学与工程] 

基　　金：funded by the National Natural Science Foundation of China (51875241,51505180, U1601203) the Jilin Province Science and Technology Development Plan(20180201126GX, 20170101134JC) the China Postdoctoral Science Foundation Funded Project (2017T100205) 

主　　题：Bulk metallic glass Fatigue Thermo-mechanical coupling Crystallization 

摘      要：Novel crystallization behaviors of Zr55Cu30Al10Ni5 bulk metallic glass are investigated. On the one hand, mixed oxides, including CuO, CuAlO2, CuA12O4 and ZrO2, show sequential oxidation process determined by coupling effects of specific cyclic load and temperature. On the other hand, at a temperature (100℃) by far lower than Tg of 412 ℃, under cyclic loading condition, non-oxidized binary alloy CuZr2 is precipitated;the thermo-mechanical coupled effects of temperature below Tg, and fatigue accumulation on the non-oxidized crystallization behaviors are revealed. Meanwhile, at a constant temperature of 400 ℃, by comparing among the XRD patterns, respectively, obtained from tensile, creep and fatigue fractures, the dominating effect of cyclic load on the generation of non-oxidized CuZr2 is verified. Furthermore, the crystallization behavior of amorphous phases under cyclic loading condition is observed through TEM micrograph and diffraction pattern at 100℃.