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

作     者：S.H.Chen T.Li W.J.Chang H.D.Yang J.C.Zhang H.H.Tang S.D.Feng F.F.Wu Y.C Wu S.H.Chen;T.Li;W.J.Chang;H.D.Yang;J.C.Zhang;H.H.Tang;S.D.Feng;F.F.Wu;Y.C Wu

作者机构：School of Mechanical EngineeringHefei University of TechnologyHefei 230009China State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao 066004China School of Materials Science and EngineeringLiaoning University of TechnologyJinzhou 121001China School of Materials Science and EngineeringHefei University of TechnologyHefei 230009China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2020年第52卷第18期

页      面：112-117页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

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) 

主　　题：Localized complex stress field Shear band Metallic glass Molecular dynamics simulation Size effect 

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 *** 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 *** 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.