Investigations on cyclic deformation behaviors and corresponding failure modes of a Ni-Based superalloy

doi:10.1016/j.msea.2020.139775

IMR OpenIR

	Investigations on cyclic deformation behaviors and corresponding failure modes of a Ni-Based superalloy
	Kong, Wei-Wen 1,2; Yuan, Chao 1; Zhang, Bao-Ning 1
通讯作者	Yuan, Chao(ychao@imr.ac.cn)
	2020-07-22
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	791 页码:12
摘要	High cycle fatigue properties with different stress levels were performed on GH4742 alloy at room temperature (RT) and 750 degrees C by staircase method. Comparative analyses of failure mode were made at the two different temperatures. The results show that failure mode changes gradually from surface defects failure to interior crystallographic facets failure with increasing temperature. Meanwhile, at 750 degrees C, the majority of specimens present crystallographic facets failure, while only three of initiations with higher stress level are associated with surface inclusions. The reasons for surface defects initiations are related to local stress concentration under lower temperatures or higher stress levels. The effects of competing failure modes on fatigue properties, including fatigue life and fatigue damage rate, were discussed in detail, which is consistent with the results fitted by Basquin relationship. Transmission Electron Microscope observation reveals that gamma' particles are sheared by dislocations at RT, whereas at 750 degrees C, climbing, bypassing and shearing mechanisms operate simultaneously, which is due to the higher thermal activation energy and stacking fault energy at 750 degrees C.
关键词	Superalloy High cycle fatigue Failure mode Dislocation structure Fatigue life
资助者	National Science and Technology Major Project
DOI	10.1016/j.msea.2020.139775
收录类别	SCI
语种	英语
资助项目	National Science and Technology Major Project[2017-VI-0018-0090]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000551484000040
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：26[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/139970
专题	中国科学院金属研究所
通讯作者	Yuan, Chao
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Kong, Wei-Wen,Yuan, Chao,Zhang, Bao-Ning. Investigations on cyclic deformation behaviors and corresponding failure modes of a Ni-Based superalloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2020,791:12.
APA	Kong, Wei-Wen,Yuan, Chao,&Zhang, Bao-Ning.(2020).Investigations on cyclic deformation behaviors and corresponding failure modes of a Ni-Based superalloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,791,12.
MLA	Kong, Wei-Wen,et al."Investigations on cyclic deformation behaviors and corresponding failure modes of a Ni-Based superalloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 791(2020):12.