Serration Behavior in Zr-Cu-Al Glass-forming Systems  

作　　者：Zhong WANG Jiao-jiao LI Li-wei REN Yong ZHANG Jun-wei QIAO Bao-cheng 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 [2]State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing

出　　处：《Journal of Iron and Steel Research International》2016年第1期42-47,共6页

基　　金：Item Sponsored by National Natural Science Foundation of China(51371122,51471025,51210105006);Program for Innovative Talents of Higher Learning Institutions of Shanxi of China(2013);Youth Natural Science Foundation of Shanxi Province of China(2015021005)

摘　　要：The metallic glass matrix composites（MGMCs）and bulk metallic glasses（BMGs）were studied by statistical analysis during plastic deformation at the strain rates of 2×10^-2,2×10^-3,and 2×10^-4 s^-1,respectively.No serration events occur in both MGMCs and BMGs during compression tests at the strain rate of 2×10^-2 s^-1.When deformed at the strain rate of 2×10^-3 s^-1,the BMG displays a larger plasticity,which is due to the larger serration events followed by a series of small serrations caused by the continuous movement of free volume.The amplitudes and elastic-energy densities increase with increasing the strain rates owing to many serrations in MGMCs.It is deduced that the Young′s modulus decreases from the normalized stress drop and fluctuations are observed on stressstrain curves,which is attributed to a lower coefficient according to the stick-slip model.The metallic glass matrix composites（MGMCs）and bulk metallic glasses（BMGs）were studied by statistical analysis during plastic deformation at the strain rates of 2×10^-2,2×10^-3,and 2×10^-4 s^-1,respectively.No serration events occur in both MGMCs and BMGs during compression tests at the strain rate of 2×10^-2 s^-1.When deformed at the strain rate of 2×10^-3 s^-1,the BMG displays a larger plasticity,which is due to the larger serration events followed by a series of small serrations caused by the continuous movement of free volume.The amplitudes and elastic-energy densities increase with increasing the strain rates owing to many serrations in MGMCs.It is deduced that the Young′s modulus decreases from the normalized stress drop and fluctuations are observed on stressstrain curves,which is attributed to a lower coefficient according to the stick-slip model.

关 键 词：bulk metallic glass metallic glass matrix composite serration shear band 

分 类 号：TB33[一般工业技术—材料科学与工程]