温度和应变率对多晶纯钛孪晶变形的影响-中国有色金属学报.PDF

18 8 2008 8 Vol. 18 No.8 The Chinese Journal of Nonferrous Metals Aug. 2008 1004-0609(2008)08-1440-06 1, 2, 3 1, 2 1, 2 1, 2 (1. 230027 2. 230027 3. 518060) (298~973 K)(3 00 1 400 /s)(0.001 0.01 /s) TB 31 A Influences of temperature and strain rate on deformation twinning of polycrystalline titanium HUANG Wen1, 2, 3, WANG Yang1, 2, LI Zi-ran1, 2, XIA Yuan-ming 1, 2 (1. Department of Mechanics and Mechanical Engineering, University of Science and Technology of China, Hefei 230027, China; 2. Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Chinese Academy of Sciences, Hefei 230027, China; 3. College of Civil Engineering, Shenzhen University, Shenzhen 518060, China) Abstract: The influences of temperature and strain rate on the deformation twinning of polycrystalline titanium were studied by tensile experiments in a temperature range of 298−973 K and a strain rate range of 0.001−1 400 /s. The tests at elevated temperatures and high strain rates were carried out using a modified split Hopkinson tension bar apparatus. The experimental results show that deformation twinning is dependent on both temperature and strain rate. The density of de