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Influence of microtwins on Portevin-Le Chatelier effect of a Ni-Co based disk superalloy
Huang, Xingwei1,2; Zhou, Xinzhe1; Wang, Weizhen1; Cui, Chuanyong3; Ye, Hengqiang2; Yang, Zhiqing1,2
Corresponding AuthorYang, Zhiqing(yangzq@imr.ac.cn)
2022-03-01
Source PublicationSCRIPTA MATERIALIA
ISSN1359-6462
Volume209Pages:6
AbstractInfluence 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.
KeywordSuperalloy Twin Dislocation Stacking fault Portevin-Le Chatelier effect
Funding OrganizationMinistry of Science and Technology of China ; Key Research Program of Frontier Sciences, CAS ; Ji Hua Laboratory
DOI10.1016/j.scriptamat.2021.114385
Indexed BySCI
Language英语
Funding ProjectMinistry 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 Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000721480800011
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/167372
Collection中国科学院金属研究所
Corresponding AuthorYang, Zhiqing
Affiliation1.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
Recommended Citation
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.
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