Interactions of Shear Bands in a Ductile Metallic Glass  

作　　者：Li-shan HUO Jun-qiang WANG Jun-tao HUO Yuan-yun ZHAO He MEN Chun-tao CHANG Xin-min WANG Run-wei LI 

机构地区：[1]Key Laboratory of Magnetic Materials and Devices,Ningbo Institute of Materials Technology & Engineering,Chinese Academy of Sciences [2]Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology,Ningbo Institute of Materials Technology & Engineering,Chinese Academy of Sciences

出　　处：《Journal of Iron and Steel Research International》2016年第1期48-52,共5页

基　　金：Item Sponsored by China Postdoctoral Science Foundation(2014M551779);Ningbo Municipal Natural Science Foundation of China(2015A610005,2015A610064);One Hundred Talents Program of Chinese Academy of Sciences

摘　　要：Shear bands play a key role in the plastic deformation of metallic glasses（MGs）.Even though there are extensive studies on the initiation and propagation of shear bands,the interactions among them have not been systematically studied yet.The interactions between the primary shear bands（PSBs）and secondary shear bands（SSBs）in a ductile Zr-based MG were studied.The residual stress near PSBs can deflect the propagation direction and reduce the propagation velocity of SSBs,which contributes to the plasticity and toughness of the MG.It was demonstrated that the probability and strength of the interactions between PSBs and SSBs would become stronger for MGs with larger Young′s modulus and smaller shear modulus,i.e.,larger Poisson′s ratio.These results are valuable in understanding the plastic deformation of MGs and may be helpful in designing new MGs with desirable mechanical properties.Shear bands play a key role in the plastic deformation of metallic glasses（MGs）.Even though there are extensive studies on the initiation and propagation of shear bands,the interactions among them have not been systematically studied yet.The interactions between the primary shear bands（PSBs）and secondary shear bands（SSBs）in a ductile Zr-based MG were studied.The residual stress near PSBs can deflect the propagation direction and reduce the propagation velocity of SSBs,which contributes to the plasticity and toughness of the MG.It was demonstrated that the probability and strength of the interactions between PSBs and SSBs would become stronger for MGs with larger Young′s modulus and smaller shear modulus,i.e.,larger Poisson′s ratio.These results are valuable in understanding the plastic deformation of MGs and may be helpful in designing new MGs with desirable mechanical properties.

关 键 词：bulk metallic glass shear band interaction plasticity serration 

分 类 号：TG139.8[一般工业技术—材料科学与工程]