Temperature rise and flow of Zr-based bulk metallic glasses under high shearing stress  

作　　者：ZHANG WeiGuo MA MingZhen SONG AiJun LIANG ShunXing HAO QiuHong TAN ChunLin JING Qin LIU RiPing 

机构地区：[1]State Key Laboratory of Meta-stable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China [2]physical-Chemistry College, Hebei Normal University of Science ＆ Technology, Qinhuangdao 066004, China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2011年第11期1972-1976,共5页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Basic Research Program of China (Grant No. 2010CB731600);the National Natural Science Foundation of China (Grant Nos. 50731005,50821001 and 51171163);the Doctoral Fund of Ministry of Education of China (Grant No. 20101333110004);the Nature Science Foundation of Hebei (Grant No. E2010001176)

摘　　要：Deformation of the bulk metallic glasses (BMGs) and the creation and propagation of the shear bands are closely interconnected.Shearing force was loaded on Zr 41.2 Ti 13.8 Cu 12.5 Ni 10.0 Be 22.5 (Vit.1) BMGs by cutting during the turning of the BMG rod.The temperature rise of alloy on the shear bands was calculated and the result showed that it could reach the temperature of the super-cooled liquid zone or exceed the melting point.The temperature rise caused viscous fluid flow and brought about the deformation of BMGs.This suggested that the deformation of BMGs was derived,at least to some extent,from the adiabatic shear temperature rise.Deformation of the bulk metallic glasses （BMGs） and the creation and propagation of the shear bands are closely interconnected. Shearing force was loaded on Zr41.2Ti13.8Cu12.5Ni10.0Be22.5（Vit.1） BMGs by cutting during the turning of the BMG rod. The temperature rise of alloy on the shear bands was calculated and the result showed that it could reach the temperature of the super-cooled liquid zone or exceed the melting point. The temperature rise caused viscous fluid flow and brought about the deformation of BMGs. This suggested that the deformation of BMGs was derived, at least to some extent, from the adiabatic shear temperature rise.

关 键 词：DEFORMATION shear bands temperature rise metallic glasses 

分 类 号：TG139.8[一般工业技术—材料科学与工程] U664.121[金属学及工艺—合金]