On the formation of shear bands in a metallic glass under tailored complex stress fields

查看全文 作　　者：[1,2]S.H.Chen;[1]T.Li;[1]W.J.Chang;[1]H.D.Yang;[1]J.C.Zhang;[1]H.H.Tang;[2]S.D.Feng;[3]F.F.Wu;Y.C [4]Wu

机构地区：[1]School of Mechanical Engineering,Hefei University of Technology,Hefei 230009,China;[2]State Key Laboratory of Metastable Materials Science and Technology,Yanshan University,Qinhuangdao 066004,China;[3]School of Materials Science and Engineering,Liaoning University of Technology,Jinzhou 121001,China;[4]School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China

出　　处：《Journal of Materials Science & Technology》索引2020年第52卷第18期,共6页

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51801049 and 51801174);the State Key Laboratory of Metastable Materials Science and Technology,Yanshan University(No.201809);the Fundamental Research Funds for the Central Universities of China(Nos.PA2019GDZC0096 and JD2019JGPY0015)。 摘　　要：The formation of shear bands in metallic glasses(MGs)was examined by tailoring localized complex stress fields(LCSFs).The findings have shown that the LCSFs in MGs can increase the localization of strained atoms and accelerate the release of accumulated deformation energy for initiating a shear band in confined and thin-layered regions.The findings not only add more knowledge to the formation mechanisms of shear bands in MGs,but also provide possible rationale for the discrepancies in the mechanical properties of different-sized MGs.As compared with the bulk samples,the higher strength and larger elastic limits in nanoscaled MGs could be attributed to the elimination of stress-concentrators,which can serve as LCSFs. 关键词：Localized complex stress field Shear band Metallic glass Molecular dynamics simulation Size effect

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On the formation of shear bands in a metallic glass under tailored complex stress fields

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