Hot Deformation Behavior of δ Processed GH4169 Alloy with High Nb Content

被引：0

作者：

Li Yuli ^{[1
]}

Zhou Xuan ^{[1
]}

Ma Tengfei ^{[1
]}

Zhang Yusheng ^{[1
,2
]}

Zhang Pingxiang ^{[1
]}

机构：

[1] Northwest Inst Nonferrous Met Res, Xian 710016, Peoples R China

[2] Xian Rare Met Mat Inst Co Ltd, Xian 710016, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2020年 / 49卷 / 07期

关键词：

GH4169; alloy; hot deformation; dynamic material modeling; constitutive model; processing maps; MAPS;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The high-quality GH4169 nickel-base superalloy has higher Nb content, and its microstructure is more sensitive to the process parameters, especially after delta phase aging (Delta Processing, DP) treatment; thus it is necessary to study its hot deformation behavior. In this paper, the hot deformation behavior of GH4169 alloy was studied by isothermal compression tests at the temperatures of 980 similar to 1070 degrees C and strain rates of 0.001 similar to 1 s(-1). The results show that the deformation temperature and the strain rate have obvious effects on the flow characteristic. A constitutive model was established based on sine-hyperbolic Arrhenius kinetic rate equation, the value of average activation energy (528.24 kJ/mop of GH4169 alloy is obtained, and increasing of Nb content will increase the modified activation energy significantly. Hot workability is interpreted by processing maps. The optimum hot working conditions for GH4169 ally is low temperature with low strain rate and high temperature with high strain rate area.

引用

页码：2470 / 2475

页数：6

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