Hot deformation behavior and microstructure evolution of GH4706 alloy

被引：0
作者：
Huang, Shuo [1 ,2 ]
Wang, Lei [1 ]
Zhang, Bei-Jiang [2 ]
Zhao, Guang-Pu [2 ]
机构：
[1] Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education), Northeastern University, Shenyang
[2] High Temperature Materials Division, Central Iron & Steel Research Institute, Beijing
来源：
Cailiao Gongcheng/Journal of Materials Engineering | 2015年 / 43卷 / 02期
关键词：
Constitutive relationship; GH4706; alloy; Hot deformation; Microstructure evolution;
D O I：
10.11868/j.issn.1001-4381.2015.02.007
中图分类号：
学科分类号：
摘要：
The hot deformation behavior of GH4706 alloy was investigated by compressive deformation performed on Gleeble 3800 machine at deformation temperature of 900-1150℃ and at strain rates of 0.001-1s-1. The results show that the true stress-true strain curves exhibit flow softening characteristic, the peak stress and peak strain decrease gradually with the increase of deformation temperatures or decrease of strain rates. Further, the constitution relationship is modeled using the hyperbolic-sine Arrhenius-type equation. The activation energy and stress exponent are 435.36kJ/mol and 4.13, respectively. The mechanisms of microstructure evolution are related to Z parameter, the domain mechanism is dynamic recovery at higher Z; while is dynamic recrystallization and grain coarsening at lower Z. The critical value of lnZ which the microstructure is completely dynamic recrystallization without grain coarsening is 35. ©, 2015, Beijing Institute of Aeronautical Materials (BIAM). All right reserved.
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页码：41 / 46
页数：5
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