Microstructural insights into fatigue short crack propagation resistance and rate fluctuation in a Ni-based superalloy manufactured by laser powder bed fusion

doi:10.1016/j.ijplas.2023.103800

IMECH-IR > 非线性力学国家重点实验室

	Microstructural insights into fatigue short crack propagation resistance and rate fluctuation in a Ni-based superalloy manufactured by laser powder bed fusion
	Li JH(李江华); Huang, Qinghui; Wang, Zhiyang; Zhang NY(张宁豫); Chen, Gang; Qian GA(钱桂安)
通讯作者	Wang, Zhiyang(zhiyangw@ansto.gov.au) ; Qian, Guian(qianguian@imech.ac.cn)
发表期刊	INTERNATIONAL JOURNAL OF PLASTICITY
	2023-12-01
卷号	171 页码:15
ISSN	0749-6419
摘要	The microstructural sensitivity of fatigue short crack path and its propagation rate in a Ni-based superalloy GH4169 manufactured by laser powder bed fusion (LPBF) was investigated at room temperature. In-situ digital image correlation (DIC) observation and post-mortem microstructural analysis around the crack path were performed. The results show that the intragranular cracks developed in the shear cracking mode are closely aligned along the activated slip bands in the gamma-matrix grains with the crystallographic characteristics of parallel to the gamma-{111} slip planes. Multiple slip was also activated, causing the crack retardation or deflection. Low-angle grain boundaries and subgrain boundaries were shown to cause deflections of intragranular cracking, while high-angle grain boundaries significantly arrested the short crack propagation. Moreover, the resistance of grain boundaries to short cracking was assessed using combined metrics including the crystallographic and microstructural parameters of twist angle, the Schmid factor and the geometrical compatibility factor. These site-specific microstructural analyses around the crack path provide insights into the microstructural origins of resistance to the short crack propagation as well as an interpretation of the observed significant fluctuations in the crack propagation rate.
关键词	Ni -based superalloy Fatigue short cracks Microstructure Propagation model
DOI	10.1016/j.ijplas.2023.103800
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:001111910600001
关键词[WOS]	LOW-CYCLE FATIGUE ; GRAIN-BOUNDARIES ; GROWTH ; BEHAVIOR ; INITIATION ; ALLOY
WOS研究方向	Engineering ; Materials Science ; Mechanics
WOS类目	Engineering, Mechanical ; Materials Science, Multidisciplinary ; Mechanics
资助项目	National Natural Science Foundation of China[12072345] ; National Natural Science Foundation of China[11932020] ; National Natural Science Foundation of China[12202444] ; National Science and Technology Major Project[J2019-VI-0012-0126] ; Science Center for Gas Turbine Project[P2022-B-III-008-001] ; China Postdoctoral Science Foundation[2021M693240]
项目资助者	National Natural Science Foundation of China ; National Science and Technology Major Project ; Science Center for Gas Turbine Project ; China Postdoctoral Science Foundation
论文分区	一类
力学所作者排名	1
RpAuthor	Wang, Zhiyang ; Qian, Guian
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/93573
专题	非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Li JH,Huang, Qinghui,Wang, Zhiyang,et al. Microstructural insights into fatigue short crack propagation resistance and rate fluctuation in a Ni-based superalloy manufactured by laser powder bed fusion[J]. INTERNATIONAL JOURNAL OF PLASTICITY,2023,171:15.
APA	李江华,Huang, Qinghui,Wang, Zhiyang,张宁豫,Chen, Gang,&钱桂安.(2023).Microstructural insights into fatigue short crack propagation resistance and rate fluctuation in a Ni-based superalloy manufactured by laser powder bed fusion.INTERNATIONAL JOURNAL OF PLASTICITY,171,15.
MLA	李江华,et al."Microstructural insights into fatigue short crack propagation resistance and rate fluctuation in a Ni-based superalloy manufactured by laser powder bed fusion".INTERNATIONAL JOURNAL OF PLASTICITY 171(2023):15.

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