Portevin-Le Chatelier effect in a wrought Ni-Co based superalloy

doi:10.1016/j.jallcom.2019.152863

CORC > 金属研究所 > 中国科学院金属研究所

	Portevin-Le Chatelier effect in a wrought Ni-Co based superalloy
	Zhang, Rui; Tian, Chenggang; Cui, Chuanyong; Zhou, Yizhou; Sun, Xiaofeng
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2020-03-25
卷号	818 页码:8
关键词	PLC effect Ni-Co based superalloy Deformation condition Microtwin
ISSN号	0925-8388
DOI	10.1016/j.jallcom.2019.152863
通讯作者	Cui, Chuanyong(chycui@imr.ac.cn)
英文摘要	For investigating the Portevin-Le Chatelier (PLC) effect in a wrought Ni-Co based superalloy with low stacking fault energy, the tensile tests of Ni-30%Co based superalloy within the temperature range of 350-550 degrees C and strain rate range of 3 x 10(-5) -3 x 10(-3) s(-1) were carried out. The microstructures were observed by optical microscope (OM) and transmission electron microscope (TEM). The serrated flow of stress-strain curves exhibited various characteristics based on the deformation conditions. The serrations transformed from type-A to type-C with increasing temperature or decreasing strain rate. The normal and inverse PLC effects were analyzed based on unpinning and pinning of mobile dislocations. The microstructural evolution shown that the deformation mechanisms were dislocation slip and stacking fault. Additionally, the tests of sample with large high-density stacking faults revealed that the amplitude of stress drop was determined by strength of the solute and microtwin obstacles. (C) 2019 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[5167189] ; National Natural Science Foundation of China[51271174] ; Ministry of Science and Technology of China[2017YFA0700703]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000506166900103
资助机构	National Natural Science Foundation of China ; Ministry of Science and Technology of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/136373]
专题	金属研究所_中国科学院金属研究所
通讯作者	Cui, Chuanyong
作者单位	Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Rui,Tian, Chenggang,Cui, Chuanyong,et al. Portevin-Le Chatelier effect in a wrought Ni-Co based superalloy[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2020,818:8.
APA	Zhang, Rui,Tian, Chenggang,Cui, Chuanyong,Zhou, Yizhou,&Sun, Xiaofeng.(2020).Portevin-Le Chatelier effect in a wrought Ni-Co based superalloy.JOURNAL OF ALLOYS AND COMPOUNDS,818,8.
MLA	Zhang, Rui,et al."Portevin-Le Chatelier effect in a wrought Ni-Co based superalloy".JOURNAL OF ALLOYS AND COMPOUNDS 818(2020):8.