Hot deformation map and its application of GH4706 alloy
来源期刊：International Journal of Minerals Metallurgy and Materials2014年第5期
论文作者：Shuo Huang Lei Wang Xin-tong Lian Guang-pu Zhao Fang-fei Li Xiao-min Zhang
文章页码：462 - 468
摘 要：The hot deformation behaviors of GH4706 alloy were investigated using compression tests in a deformation temperature range from 900°C to 1200°C with a strain rate range of 0.001–1 s-1.Hot processing maps were developed on the basis of the dynamic material model and compression data.A three-dimensional distribution of power dissipation parameter（η） with strain rate and temperature reveals that η decreases in sensitivity with an increase in strain rate and a decrease in temperature.Microstructure studies show that the grain size of GH4706 alloy increases when η is larger than 0.32,and the microstructure exhibits local deformation when η is smaller than 0.23.The hot processing map at the strain of 0.7 exposes a domain peak at η=0.32 for the temperature between 940°C and 970°C with the strain rate from 0.015 s-1 to 0.003 s-1,and these are the optimum parameters for hot working.
Shuo Huang1,2，Lei Wang1，Xin-tong Lian1,2，Guang-pu Zhao2，Fang-fei Li2，Xiao-min Zhang2
1. Key Lab for Anisotropy and Texture of Materials,Northeastern University2. Department of High Temperature Materials,Central Iron and Steel Research Institute
摘 要：The hot deformation behaviors of GH4706 alloy were investigated using compression tests in a deformation temperature range from 900°C to 1200°C with a strain rate range of 0.001–1 s-1.Hot processing maps were developed on the basis of the dynamic material model and compression data.A three-dimensional distribution of power dissipation parameter（η） with strain rate and temperature reveals that η decreases in sensitivity with an increase in strain rate and a decrease in temperature.Microstructure studies show that the grain size of GH4706 alloy increases when η is larger than 0.32,and the microstructure exhibits local deformation when η is smaller than 0.23.The hot processing map at the strain of 0.7 exposes a domain peak at η=0.32 for the temperature between 940°C and 970°C with the strain rate from 0.015 s-1 to 0.003 s-1,and these are the optimum parameters for hot working.
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