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Creep deformation related to gamma ' phase cutting at high temperature of a [111] oriented nickel-base single crystal superalloy
Li, Yifei; Wang, Li; Zhang, Gong; Zheng, Wei; Qi, Dongqing; Du, Kui; Zhang, Jian; Lou, Langhong
2019-08-19
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume763
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
Indexed BySCI
Language英语
WOS IDWOS:000483456900036
PublisherELSEVIER SCIENCE SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80825
Collection中国科学院金属研究所
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.
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.
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).
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