Mechanical behaviour of Al/Al_(2)O_(3) composite in pseudo-semi-solid state during isothermal compression  

作　　者：CHENG Yuan-sheng LUO Shou-jing 程远胜;罗守靖(School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China

出　　处：《Transactions of Nonferrous Metals Society of China》2009年第S02期368-372,共5页中国有色金属学报（英文版）

基　　金：Project(50705018)supported by the National Natural Science Foundation of China;Project(20070420847)supported by the Postdoctor Foundation of China;Project(LBH-Z07140)supported by the Postdoctor Foundation of Heilongjiang。

摘　　要：To gain a better understanding of thixoforging for the Al_(2)O_(3)-37%Al composite,its mechanical behavior in the pseudo-semi-solid state was studied by isothermal compression tests.The results show that the values of peak stress obviously decrease with increasing temperature and decreasing strain rate.The compressive true stress-strain curves of the Al_(2)O_(3)-37%Al composite can be divided into four stages.They are rapidly ascending,decreasing,steady and slowly ascending.Moreover,the main deformation mechanism controlling deformation of the composite in the pseudo-semi-solid state is the sliding or rotary movement between solid particles.

关 键 词：COMPOSITE pseudo-semi-solid state mechanical behaviour stress—strain curve 

分 类 号：TB33[一般工业技术—材料科学与工程]