Critical Shear Offset of Fracture in a Zr-based Metallic Glass

作     者：Zhi-yuan LIU Yong YANG Chain-tsuan LIU 

作者机构：Shenzhen Key Laboratory of Advanced Manufacturing Technology for Mold & DieDepartment of Mechanical and Electronic EngineeringShenzhen University Centre for Advanced Structural MaterialsDepartment of Mechanical and Biomedical EngineeringCollege of CSECity University of Hong Kong 

出 版 物：《Journal of Iron and Steel Research International》 (Journal of Iron and Steel Research, International)

年 卷 期：2016年第23卷第1期

页      面：53-56页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Item Sponsored by Natural Science Foundation of Guangdong Province of China(2014A030310189) Shenzhen Senior Talent Research Start-up Funding of China(827000056) General Research Fund from Research Grant Council of Hong Kong Government of China(CityU 102013) 

主　　题：metallic glass shear band fracture temperature rise 

摘      要：The nanoscale shear band operation process of Zr_（55）Pd_（10）Cu_（20）Ni_5Al_（10） metallic glass（MG）was reined in by constant force during well-designed loading-holding-unloading cyclic microcompression *** the test,it is revealed that the whole shear banding process involves three stages：shear band initiation,shear sliding and shear band *** on the energy balance principle,the size-affected speed of shear sliding is *** energy originated from the shear sliding leads to heat-up of the shear plane;therefore,the temperature in shear band increases with the size of shear offset caused by the energy accumulation during shear *** the glass transition temperature as the critical temperature of fracture for the Zr-based MG,the critical shear offset is predicted to be approximately 190μm,fully in line with the experimental *** directly proved that the fracture of the MG is caused by the temperature rise during shear sliding.