Influence of microtwins on Portevin-Le Chatelier effect of a Ni-Co based disk superalloy

doi:10.1016/j.scriptamat.2021.114385

IMR OpenIR

	Influence of microtwins on Portevin-Le Chatelier effect of a Ni-Co based disk superalloy
	Huang, Xingwei 1,2; Zhou, Xinzhe 1; Wang, Weizhen 1; Cui, Chuanyong 3; Ye, Hengqiang 2; Yang, Zhiqing 1,2
通讯作者	Yang, Zhiqing(yangzq@imr.ac.cn)
	2022-03-01
发表期刊	SCRIPTA MATERIALIA
ISSN	1359-6462
卷号	209 页码:6
摘要	Influence of microtwins (MTs) on Portevin-Le Chatelier (PLC) effect of a Ni-Co-based superalloy was investigated by tensile tests and transmission electron microscopy. Two groups of samples were pre-strained at 725 degrees C to produce MTs. Existence of MTs improved the alloy's yield strength, but it changed the PLC effect from type-B to type-C, and increased the serration amplitudes by similar to 6 times, during tensile deformation at 400 degrees C. Microstructural characterizations indicate that dislocation-MT interactions lead to break of MTs in both gamma matrix and gamma' precipitates, creating soft channels for dislocation glide. The high serration amplitudes were rationalized on the basis of sudden plastic flow along those soft channels and subsequently strain hardening due to dislocation multiplication. These results demonstrate that MTs influence the PLC effect much more significantly, compared with traditionally accepted dislocation-solute interactions. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
关键词	Superalloy Twin Dislocation Stacking fault Portevin-Le Chatelier effect
资助者	Ministry of Science and Technology of China ; Key Research Program of Frontier Sciences, CAS ; Ji Hua Laboratory
DOI	10.1016/j.scriptamat.2021.114385
收录类别	SCI
语种	英语
资助项目	Ministry of Science and Technology of China[2017YFA0700703] ; Ministry of Science and Technology of China[2019YFA0705304] ; Key Research Program of Frontier Sciences, CAS[QYZDY-SSW-JSC027] ; Ji Hua Laboratory[X210141TL210]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000721480800011
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：14[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/321006/167372
专题	中国科学院金属研究所
通讯作者	Yang, Zhiqing
作者单位	1.Univ Sci & Technol China, Chinese Acad Sci, Sch Mat Sci & Engn, Inst Met Res,Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Ji Hua Lab, Foshan 528000, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Superalloy Div, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Huang, Xingwei,Zhou, Xinzhe,Wang, Weizhen,et al. Influence of microtwins on Portevin-Le Chatelier effect of a Ni-Co based disk superalloy[J]. SCRIPTA MATERIALIA,2022,209:6.
APA	Huang, Xingwei,Zhou, Xinzhe,Wang, Weizhen,Cui, Chuanyong,Ye, Hengqiang,&Yang, Zhiqing.(2022).Influence of microtwins on Portevin-Le Chatelier effect of a Ni-Co based disk superalloy.SCRIPTA MATERIALIA,209,6.
MLA	Huang, Xingwei,et al."Influence of microtwins on Portevin-Le Chatelier effect of a Ni-Co based disk superalloy".SCRIPTA MATERIALIA 209(2022):6.