Constitutive Characteristic of Hot Deformation for Spray Formed Superalloy GH738
The hot deformation behaviors of spray formed superalloy GH738 were investigated by using of Gleeble-3500 simulator in the temperature range of 950~1200℃,with a strain rate of 0.13~6.5s-1 and reduction of 50%.The corresponding flow curves were determined and hot deformed microstructures were observed.The results showed that the flow stress decreased with increasing deformation temperature or decreasing strain rate.A full dynamic recrystallization microstructures with fine-equiaxed grains were obtained at the temperature of 1100~1150℃ and strain rate of 2.6~6.5s-1.The hot deformation activation energy Q was 580.81kJ.mol-1,and the constitutive equation was derived by means of linear regression.
Spray forming Superalloy GH738 Hot deformation Constitutive equation
Yue Wang Zhou Li Wenyong Xu Hua Yuan Na Liu Zhengjiang Gao Shifan Tian Guoqing Zhang
Science and Technology on Advanced High Temperature Structural Materials Laboratory, Beijing Institute of Aeronautical Materials, Beijing 100095, China
国际会议
the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))
太原
英文
569-574
2012-07-13（万方平台首次上网日期，不代表论文的发表时间）