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Creep anisotropy of a 3rd generation nickel-base single crystal superalloy at 850 degrees C
Li, Yifei; Wang, Li; Zhang, Gong; Zhang, Jian; Lou, Langhong
2019-07-08
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume760Pages:26-36
AbstractThe influence of orientation on the creep behaviors of a 3rd generation single crystal superalloy was studied at 850 degrees C. It is found that the creep properties are highly anisotropic for [001], [011] and [111] specimens. The [111] samples show the longest creep life. The [011] specimens display the shortest creep life of less than 1 h and the longest elongation. And [001] specimens exhibit the intermediate creep life. Electron backscattered diffraction (EBSD) analyses and transmission electron microscopy (TEM) observations show that the creep anisotropy is mainly related to the slip systems that activated, especially the < 112 > {111} slip systems. Single slip of < 112 > {111} system results in a high creep strain and poor property, which controls the primary creep of [001] and entire creep stage of [011] specimens. While interaction of primary and secondary < 112 > {111} systems has an effect on work hardening, which occurs during steady and tertiary creep of [111] orientation and hence results in the best creep property of [111] specimens. By comparing with SRR99 and CMSX-4 alloys, higher Re content in DD33 alloy may facilitate the formation of continuous stacking faults in [011] specimens and activation of multiple < 112 > {111} slip systems in [111] specimens, which will affect the creep property and anisotropy.
KeywordNickel base superalloy Creep Anisotropy Microstructure Dislocation
Indexed BySCI
Language英语
WOS IDWOS:000474501200004
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80918
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 anisotropy of a 3rd generation nickel-base single crystal superalloy at 850 degrees C[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2019,760:26-36.
APA Li, Yifei,Wang, Li,Zhang, Gong,Zhang, Jian,&Lou, Langhong.(2019).Creep anisotropy of a 3rd generation nickel-base single crystal superalloy at 850 degrees C.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,760,26-36.
MLA Li, Yifei,et al."Creep anisotropy of a 3rd generation nickel-base single crystal superalloy at 850 degrees C".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 760(2019):26-36.
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