Hot Deformation Behavior and Microstructure Evolution of New-Type Ni-Cr-Co Based Alloy

CORC > 兰州理工大学 > 兰州理工大学 > 省部共建有色金属先进加工与再利用国家重点实验室

	Hot Deformation Behavior and Microstructure Evolution of New-Type Ni-Cr-Co Based Alloy
	Wang, Xingmao; Ding, Yutian; Gao, Yubi; Yan, Kang; Ma, Yuanjun; Chen, Jianjun
刊名	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
	2022
卷号	51 期号:1 页码:249-259
关键词	Activation energy Chromium alloys Compression testing Deformation Dynamic recrystallization Dynamics Grain boundaries Nickel alloys Nucleation Strain rate Temperature Ternary alloys Co-based alloys Continuous dynamic recrystallization Deformation temperatures Dynamic recrystallisation Hot deformation behaviors Hot processing New-type ni-cr-co based alloy Nucleation mechanism Processing maps Strain-rates
ISSN号	1002-185X
英文摘要	Hot deformation behavior of a new-type Ni-Cr-Co based alloy was investigated by thermal compression tests under the deformation temperature range of 1050~1250 and strain rate range of 0.001~1 s-1. The electron backscatter diffraction (EBSD) technique was employed to investigate the effects of deformation temperature and strain rate on the microstructure evolution of the alloy and nucleation mechanisms of dynamic recrystallization. The result shows that the flow stress decreases with the increasing of the deformation temperature and the decreasing of strain rate. The Arrhenius constitutive equation and hot processing map of the alloy were established based on the hot deformation data, and the hot deformation activation energy was calculated as 520.03 kJ/mol. The optimum hot processing interval is at the temperature scope of 1175~1250 and the strain rate range of 0.006~1 s-1 with the peak power dissipation efficiency of 45%. The fraction of dynamic recrystallization increases with the increasing of deformation temperature and the decreasing of strain rate. And during dynamic recrystallization, a large number of deformed grains are replaced by fine equiaxial grains and a high frequency of ∑3 twin boundaries generates. The dominant dynamic recrystallization nucleation mechanism is grain boundary bulging, which is a typical feature of discontinuous dynamic recrystallization. In the low temperature and high strain rate region, continuous dynamic recrystallization characterized by the rotation of subgrains is detected. However, continuous dynamic recrystallization is just an assistant nucleation mechanism for the alloy. © 2022, Science Press. All right reserved.
语种	中文
出版者	Science Press
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158041]
专题	省部共建有色金属先进加工与再利用国家重点实验室
作者单位	State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, School of Material Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Wang, Xingmao,Ding, Yutian,Gao, Yubi,et al. Hot Deformation Behavior and Microstructure Evolution of New-Type Ni-Cr-Co Based Alloy[J]. Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering,2022,51(1):249-259.
APA	Wang, Xingmao,Ding, Yutian,Gao, Yubi,Yan, Kang,Ma, Yuanjun,&Chen, Jianjun.(2022).Hot Deformation Behavior and Microstructure Evolution of New-Type Ni-Cr-Co Based Alloy.Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering,51(1),249-259.
MLA	Wang, Xingmao,et al."Hot Deformation Behavior and Microstructure Evolution of New-Type Ni-Cr-Co Based Alloy".Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering 51.1(2022):249-259.