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Creep deformation related to gamma ' phase cutting at high temperature of a [111] oriented nickel-base single crystal superalloy
Li, Yifei1,2; Wang, Li1; Zhang, Gong1; Zheng, Wei1; Qi, Dongqing1; Du, Kui1; Zhang, Jian1; Lou, Langhong1
Corresponding AuthorWang, Li(wangli@imr.ac.cn)
2019-08-19
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume763Pages:7
AbstractThe configurations of superdislocations in a [111]-oriented nickel-base single crystal superalloy have been investigated after creep deformation at 1100 degrees C/150 MPa. The superdislocation arrays and hexagonal super dislocation networks are formed in irregular rafted gamma' phase, which are rarely observed in [001] crept specimens. It is believed that the superdislocation networks are formed by reactions of superdislocation arrays and another kind of superdislocations. Careful diffraction contrast analysis shows that the Burgers vector of the super-dislocation arrays is a [01 (1) over bar], which is not the favorable slip system when loaded along [111]. The formation of the arrays is supposed to be related to the matrix dislocations cross slipping in two {001} channels and the stress concentration caused by inhomogeneous rafted structures. The networks in gamma' phase may prevent dislocation movement and slash the increase of creep rate to some extent.
KeywordSuperalloy Creep Superdislocation Rafted structure [111] orientation
Funding OrganizationNational Natural Science Foundation of China ; National Key Research and Development Program of China
DOI10.1016/j.msea.2019.138162
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[51871210] ; National Natural Science Foundation of China[51671196] ; National Natural Science Foundation of China[51631008] ; National Natural Science Foundation of China[51771204] ; National Key Research and Development Program of China[2016YFB0701403]
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000483456900036
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/135313
Collection中国科学院金属研究所
Corresponding AuthorWang, Li
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China
Recommended Citation
GB/T 7714
Li, Yifei,Wang, Li,Zhang, Gong,et al. Creep deformation related to gamma ' phase cutting at high temperature of a [111] oriented nickel-base single crystal superalloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2019,763:7.
APA Li, Yifei.,Wang, Li.,Zhang, Gong.,Zheng, Wei.,Qi, Dongqing.,...&Lou, Langhong.(2019).Creep deformation related to gamma ' phase cutting at high temperature of a [111] oriented nickel-base single crystal superalloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,763,7.
MLA Li, Yifei,et al."Creep deformation related to gamma ' phase cutting at high temperature of a [111] oriented nickel-base single crystal superalloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 763(2019):7.
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