Effects of Crystal Orientations on the Low-Cycle Fatigue of a Single-Crystal Nickel-Based Superalloy at 980 degrees C

doi:10.1007/s40195-018-0779-4

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	Effects of Crystal Orientations on the Low-Cycle Fatigue of a Single-Crystal Nickel-Based Superalloy at 980 degrees C
	Liu, Liu 1,2; Meng, Jie 2; Liu, Jin-Lai 2; Zhang, Hai-Feng 1,3; Sun, Xu-Dong 1; Zhou, Yi-Zhou 2
刊名	ACTA METALLURGICA SINICA-ENGLISH LETTERS
	2019-03-01
卷号	32 期号:3 页码:381-390
关键词	Single-crystal superalloy Low-cycle fatigue Anisotropy Fracture behavior
ISSN号	1006-7191
DOI	10.1007/s40195-018-0779-4
通讯作者	Meng, Jie(jmeng@imr.ac.cn)
英文摘要	The influence of crystal orientations on the low-cycle fatigue (LCF) behavior of a 3Re-bearing Ni-based single-crystal superalloy at 980 degrees C has been investigated. It is found that the orientation dependence of the fatigue life not only depends on the elastic modulus, but also the number of active slip planes and the plasticity of materials determine the LCF life, especially for the [011] and [111] specimens. The [011] and [111] specimens with better plasticity withstand relatively concentrated inelastic deformation caused by fewer active slip planes, compared to the [001] specimens resisting widespread deformation caused by a higher number of active slip planes. Additionally, fatigue fracture is also influenced by cyclic plastic deformation mechanisms of the alloy with crystal orientations, and the [001] specimens are plastically deformed by wave slip mechanism and fracture along the non-crystallographic plane, while the [011] and [111] specimens are plastically deformed by planar slip mechanism and fracture along the crystallographic planes. Moreover, casting pores, eutectics, inclusions and surface oxide layers not only initiate the crack, but also reduce the stress concentration around crack tips. Our results throw light upon the effect of inelastic strain on the LCF life and analyze the cyclic plastic deformation for the alloy with different orientations.
资助项目	National Natural Science Foundation of China[51571196] ; National Natural Science Foundation of China[51671188] ; National Natural Science Foundation of China[5160119] ; Shenyang Science and Technology Project[17-101-2-00]
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	CHINESE ACAD SCIENCES, INST METAL RESEARCH
WOS记录号	WOS:000462257400011
资助机构	National Natural Science Foundation of China ; Shenyang Science and Technology Project
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/132454]
专题	金属研究所_中国科学院金属研究所
通讯作者	Meng, Jie
作者单位	1.Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Liaoning, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Superalloys Div, Shenyang 110016, Liaoning, Peoples R China 3.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Liu, Liu,Meng, Jie,Liu, Jin-Lai,et al. Effects of Crystal Orientations on the Low-Cycle Fatigue of a Single-Crystal Nickel-Based Superalloy at 980 degrees C[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2019,32(3):381-390.
APA	Liu, Liu,Meng, Jie,Liu, Jin-Lai,Zhang, Hai-Feng,Sun, Xu-Dong,&Zhou, Yi-Zhou.(2019).Effects of Crystal Orientations on the Low-Cycle Fatigue of a Single-Crystal Nickel-Based Superalloy at 980 degrees C.ACTA METALLURGICA SINICA-ENGLISH LETTERS,32(3),381-390.
MLA	Liu, Liu,et al."Effects of Crystal Orientations on the Low-Cycle Fatigue of a Single-Crystal Nickel-Based Superalloy at 980 degrees C".ACTA METALLURGICA SINICA-ENGLISH LETTERS 32.3(2019):381-390.