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《Ordnance Material Science and Engineering》 2004-04
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High temperature deformation and dynamic recrystallization of a new type of P/M superalloy

LIU Jian - tao, CHEN Huan - ming, HU Ben-fu, LIU Guo - quan, ZHANG Yi - wen (1. School of Material Science and Engineering, University of science&Technology Beijing, Beijing 100083, China; 2. High Temperature Material Institute, Central Iron Steel Research Institute, Beijing 100081, China)  
High temperature deformation and dynamic recrystallization behavior of as - hipped P/M superalloy at 1 120℃-1 170℃, with strain rate at 2 × 10-3s-1- 2 × 10-1s-1were studied by means of isothermal compression test at Gleeble -1 500 thermal mechanical simulator. The results show that the peak flow stress (σp) can be correlated with temperature ( T) and strain rate (ε) by the following equation: Z = ε ?exp( Qa/RT) = A2σpn. Refined grain can be obtained under certain deformation condition, The natrual logarithm of dynamic recrystallization grain size is linear with the natrual logarithm of Zen-er - Hollomon parameter.
【Fund】: “十五”民口配套重大研究项目(MKPT-01-127ZD)
【CateGory Index】: TF125.212
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