Hot deformation behavior and workability of a Ni-Co based superalloy

doi:10.1016/j.jallcom.2020.154618

IMR OpenIR

	Hot deformation behavior and workability of a Ni-Co based superalloy
	Liu, Peng 1,2; Zhang, Rui 1; Yuan, Yong 3; Cui, Chuanyong 1; Zhou, Yizhou 1; Sun, Xiaofeng 1
通讯作者	Cui, Chuanyong(chycui@imr.ac.cn)
	2020-08-05
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	831 页码:12
摘要	The hot deform ation behavior of a new N i-Co based alloy was investigated by the isothermal compression tests in a temperature range of 1060-1180 degrees C and a strain rate range of 0.01-10 s(-1) under a true strain of 0.693. The results show that the flow stress, corrected by friction and adiabatic heating, increases with the decreasing temperature and increasing strain rate. Considering the dissolution of the cprecipitates during hot deformation, the Arrhenius-type constitutive equations w ere established segmentally via fitting the corrected flow stress data. The activation energies for the gamma + gamma' dual-phase region and the gamma' single-phase region of the alloy are 671 and 391 kJ mol(-1), respectively. The reason for higher activation energy of the gamma + gamma' dual-phase region is that gamma' ((N i,Co)(3)(Al,Ti)) precipitates hinder dislocation slip and harden the alloys during hot deformation. The processing map based on the dynamic material model (DMM) was also constructed. According to the analysis of microstructural evolution, dynamic recrystallization (DRX) occurs under all deform ation conditions. The optim um hot deform ation processing conditions for the gamma + gamma' dual-phase region are 1060-1070 degrees C/0.01-0.02 s(-1) or 1070-1141 degrees C/ 0.01-1 s(-1). In addition, the optimal processing parameter for the gamma single-phase region is 1141-1175 degrees C/0.01-10 s(-1) (except a part of flow instability domain). (C) 2020 Elsevier B.V. All rights reserved.
关键词	Ni-Co based Superalloy Hot deformation behavior Constitutive equation Processing map Microstructural evolution
资助者	National Natural Science Foundation of China ; Ministry of Science and Technology of China
DOI	10.1016/j.jallcom.2020.154618
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51671189] ; Ministry of Science and Technology of China[2017YFA0700703] ; Ministry of Science and Technology of China[2019YFA0705304]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000531727400001
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：77[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/138877
专题	中国科学院金属研究所
通讯作者	Cui, Chuanyong
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 3.Xian Thermal Power Res Inst Co Ltd, Xian 710032, Peoples R China
推荐引用方式 GB/T 7714	Liu, Peng,Zhang, Rui,Yuan, Yong,et al. Hot deformation behavior and workability of a Ni-Co based superalloy[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2020,831:12.
APA	Liu, Peng,Zhang, Rui,Yuan, Yong,Cui, Chuanyong,Zhou, Yizhou,&Sun, Xiaofeng.(2020).Hot deformation behavior and workability of a Ni-Co based superalloy.JOURNAL OF ALLOYS AND COMPOUNDS,831,12.
MLA	Liu, Peng,et al."Hot deformation behavior and workability of a Ni-Co based superalloy".JOURNAL OF ALLOYS AND COMPOUNDS 831(2020):12.