Deformation behavior of TiNiFe alloy in isothermal compression  

作　　者：Wang, Shujuan  Mi, Xujun  Yin, Xiangqian  Li, Yanfeng 

机构地区：[1]State Key Laboratory for Fabrication and Processing of Nonferrous Metals,General Research Institute for Nonferrous Metals,Beijing,100088,China

出　　处：《Rare Metals》2012年第4期323-327,共5页稀有金属（英文版）

基　　金：supported by the Basic Research Program (973 Program) of China (No. 2010CB735811)

摘　　要：The hot deformation behavior of TiNiFe shape memory alloy was studied by isothermal compression tests.It was performed on a Gleeble-3500 thermal simulation machine at deformation temperature of 750 to 1050 ℃ and strain rate of 0.01 to 10.00 s^(-1) with maximum strain of 0.8.Deformation mechanism was investigated by the aid of true stress-true strain curves,kinetic analysis and processing map.The constitutive relationship was established in the form of Arrhenius-type hyperbolic-sine equation,and the apparent activation energy was calculated to be approximately 200 kJ·mol^(-1).The processing maps of TiNiFe alloy were appreciably influenced by true strain.

关 键 词：shape memory alloy high temperature deformation constitutive equation processing map 

分 类 号：TG146.23[一般工业技术—材料科学与工程]