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Portevin-Le Chatelier effect in a wrought Ni-Co based superalloy
Zhang, Rui; Tian, Chenggang; Cui, Chuanyong; Zhou, Yizhou; Sun, Xiaofeng
Corresponding AuthorCui, Chuanyong(chycui@imr.ac.cn)
2020-03-25
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume818Pages:8
AbstractFor 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.
KeywordPLC effect Ni-Co based superalloy Deformation condition Microtwin
Funding OrganizationNational Natural Science Foundation of China ; Ministry of Science and Technology of China
DOI10.1016/j.jallcom.2019.152863
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[5167189] ; National Natural Science Foundation of China[51271174] ; Ministry of Science and Technology of China[2017YFA0700703]
WOS Research AreaChemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectChemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000506166900103
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/136374
Collection中国科学院金属研究所
Corresponding AuthorCui, Chuanyong
AffiliationChinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
Recommended Citation
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.
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