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

CORC > 力学研究所 > 中国科学院力学研究所 > 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, Jianghua 3; Huang, Qinghui 3; Wang, Zhiyang 2; Zhang, Ningyu 3; Chen, Gang 1; Qian, Guian 3
刊名	INTERNATIONAL JOURNAL OF PLASTICITY
	2023-12-01
卷号	171 页码:15
关键词	Ni -based superalloy Fatigue short cracks Microstructure Propagation model
ISSN号	0749-6419
DOI	10.1016/j.ijplas.2023.103800
通讯作者	Wang, Zhiyang(zhiyangw@ansto.gov.au) ; Qian, Guian(qianguian@imech.ac.cn)
英文摘要	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.
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]
WOS关键词	LOW-CYCLE FATIGUE ; GRAIN-BOUNDARIES ; GROWTH ; BEHAVIOR ; INITIATION ; ALLOY
WOS研究方向	Engineering ; Materials Science ; Mechanics
语种	英语
WOS记录号	WOS:001111910600001
资助机构	National Natural Science Foundation of China ; National Science and Technology Major Project ; Science Center for Gas Turbine Project ; China Postdoctoral Science Foundation
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/93572]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Wang, Zhiyang; Qian, Guian
作者单位	1.Tianjin Univ, Sch Chem Engn & Technol, Tianjin, Peoples R China 2.Australian Nucl Sci & Technol Org ANSTO, Sydney, NSW 2234, Australia 3.Chinese Acad Sci, State Key Lab Nonlinear Mech LNM, Inst Mech, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Li, Jianghua,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	Li, Jianghua,Huang, Qinghui,Wang, Zhiyang,Zhang, Ningyu,Chen, Gang,&Qian, Guian.(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	Li, Jianghua,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.