Self-organized Criticality Behavior in Bulk Metallic Glasses  

作　　者：Jun-wei QIAO Zhong WANG 

机构地区：[1]Laboratory of Applied Physics and Mechanics of Advanced Materials,College of Materials Science and Engineering,Taiyuan University of Technology

出　　处：《Journal of Iron and Steel Research International》2016年第1期7-13,共7页

基　　金：Item Sponsored by National Natural Science Foundation of China(51371122);Program for the Innovative Talents of Higher Learning Institutions of Shanxi of China(2013);The Youth Natural Science Foundation of Shanxi Province of China(2015021005)

摘　　要：Serrated flows are known as repeated yielding of bulk metallic glasses（BMGs）during plastic deformation under different loading conditions,which are associated with the operation of shear banding.According to the statistics of some parameters,the shear avalanches can display a self-organized critical state,suggesting a large ductility of BMGs.The emergence of the self-organized criticality（SOC）behavior in different BMGs is due to the temperature,strain rate,and chemical compositions.The SOC behavior is accompanied with the following phenomena：the interactions occur in the shear bands;the incubation time is longer than the relaxation time;the time interval is lacking of typical time scale;and the spatial or temporal parameters should display apower-law distribution.Serrated flows are known as repeated yielding of bulk metallic glasses（BMGs）during plastic deformation under different loading conditions,which are associated with the operation of shear banding.According to the statistics of some parameters,the shear avalanches can display a self-organized critical state,suggesting a large ductility of BMGs.The emergence of the self-organized criticality（SOC）behavior in different BMGs is due to the temperature,strain rate,and chemical compositions.The SOC behavior is accompanied with the following phenomena：the interactions occur in the shear bands;the incubation time is longer than the relaxation time;the time interval is lacking of typical time scale;and the spatial or temporal parameters should display apower-law distribution.

关 键 词：self-organized criticality behavior bulk metallic glass serrated flow power-law distribution 

分 类 号：TG139.8[一般工业技术—材料科学与工程]