The effects of temperature and stress on the high-cycle fatigue properties of a Ni-based wrought superalloy

doi:10.1016/j.ijfatigue.2023.107669

IMR OpenIR

	The effects of temperature and stress on the high-cycle fatigue properties of a Ni-based wrought superalloy
	Chen, Yipeng 1,2; Kong, Weiwen 1; Yuan, Chao 2; Liu, Shuai 2; Cai, Yong 1; Wang, Yongqiang 1,2; Gao, Xinyu 1,2
通讯作者	Yuan, Chao(ychao@imr.ac.cn)
	2023-07-01
发表期刊	INTERNATIONAL JOURNAL OF FATIGUE
ISSN	0142-1123
卷号	172 页码:17
摘要	The high-cycle fatigue behavior of the wrought superalloy GH4742 was studied at room-temperature (RT), 650 degrees C and 750 degrees C. The fatigue strength at 107 cycles of the GH4742 alloy increases with increasing temperature, which is mainly due to the different fracture modes at different temperatures. Fatigue cracks at room temper-ature originate from the specimen surface, including surface inclusions, surface carbides, surface slip and surface crystallographic facets. At 650 degrees C and 750 degrees C, the fatigue crack initiations originate from the subsurface or in-ternal crystallographic planes under lower stress levels, while the surface defects or surface crystallographic planes originate under higher stress levels. The dislocation density of the GH4742 superalloy is low at room temperature and 650 degrees C, and the deformation mechanism is mainly governed by APBs shearing primary gamma ' and Orowan bypassing secondary and tertiary gamma '. When the temperature rises to 750 degrees C, the deformation mechanism is mainly governed by stacking faults shearing primary, secondary and tertiary gamma '. Furthermore, antiphase boundaries (APBs) shearing primary gamma ' and Orowan bypassing secondary and tertiary gamma ' occur.
关键词	GH4742 High -cycle fatigue Fatigue life Fatigue failure mechanism
资助者	National Science and Technology Major Project
DOI	10.1016/j.ijfatigue.2023.107669
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	Engineering ; Materials Science
WOS类目	Engineering, Mechanical ; Materials Science, Multidisciplinary
WOS记录号	WOS:000982156000001
出版者	ELSEVIER SCI LTD
引用统计	被引频次：9[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/321006/177484
专题	中国科学院金属研究所
通讯作者	Yuan, Chao
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Chen, Yipeng,Kong, Weiwen,Yuan, Chao,et al. The effects of temperature and stress on the high-cycle fatigue properties of a Ni-based wrought superalloy[J]. INTERNATIONAL JOURNAL OF FATIGUE,2023,172:17.
APA	Chen, Yipeng.,Kong, Weiwen.,Yuan, Chao.,Liu, Shuai.,Cai, Yong.,...&Gao, Xinyu.(2023).The effects of temperature and stress on the high-cycle fatigue properties of a Ni-based wrought superalloy.INTERNATIONAL JOURNAL OF FATIGUE,172,17.
MLA	Chen, Yipeng,et al."The effects of temperature and stress on the high-cycle fatigue properties of a Ni-based wrought superalloy".INTERNATIONAL JOURNAL OF FATIGUE 172(2023):17.