Cracking mechanisms in additively manufactured pure tungsten from printing single tracks, thin walls and cubes

doi:10.1016/j.matdes.2023.112363

CORC > 力学研究所 > 中国科学院力学研究所 > 宽域飞行工程科学与应用中心

	Cracking mechanisms in additively manufactured pure tungsten from printing single tracks, thin walls and cubes
	Chen, Jinhan 4,5; Li, Mingshen 5; Li, Kailun 3; Zhang, Wenjing 5; Yang, Zhengmao 2; Zhao, Congcong 1; Ma, Jing 5; Liu, Wei 5
刊名	MATERIALS & DESIGN
	2023-10-01
卷号	234 页码:17
关键词	Cracking Tungsten Additive manufacturing Grain boundaries Microstructures Geometric effect
ISSN号	0264-1275
DOI	10.1016/j.matdes.2023.112363
通讯作者	Zhang, Wenjing(wjzhangneu@163.com) ; Yang, Zhengmao(zmyang@imech.ac.cn) ; Liu, Wei(liuw@mail.tsinghua.edu.cn)
英文摘要	Cracking is a critical issue in the additive manufacturing of pure tungsten (W). To eliminate crack formation, it is imperative to gain an in-depth understanding of the underlying mechanisms behind this process. In this study, we systematically investigated the crack behaviors of single tracks, thin walls, and cubes fabricated using powder bed fusion-laser beam (PBF-LB) technology with nonrotational parallel-hatching scanning. The energy framework was employed to elucidate the mechanism of crack formation. The longitudinal cracks appearing in the microstructures of single tracks and the through cracks existing in thin walls and cubes were characterized. Notably, periodic through cracks extended upward across the sample, appearing at every single hatch in unidirectional samples and at every other hatch in bidirectional samples. The horizontal, longitudinal, and transverse cross sections of cubes were studied to clarify the correlation between through crack arrangement and solidification microstructure. Based on a comprehensive analysis of grain boundaries, we proposed a deformation-cracking competition mechanism in PBF-LB tungsten. Geometric effects in the crack and microstructure were also revealed. This study could provide valuable insights into the formation of cracks in PBF-LB tungsten and serve as a foundation for future investigations aimed at eliminating cracks.
资助项目	National Magnetic Confinement Fusion Science Program of China[2019YFE03130003] ; National Magnetic Confinement Fusion Science Program of China[2022YEF03130003] ; National Natural Science Foundation of China[51971115] ; National Natural Science Foundation of China[52001135] ; National Natural Science Foundation of China[52105165] ; National Natural Science Foundation of China[52275391] ; China Postdoctoral Science Foundation[2022M711753] ; School of Aerospace Engineering, Tsinghua University
WOS关键词	POWDER BED FUSION ; RESIDUAL-STRESS ; LASER ; MICROSTRUCTURE ; DENSIFICATION ; SUPPRESSION ; PERFORMANCE ; PARAMETERS ; BEHAVIOR
WOS研究方向	Materials Science
语种	英语
WOS记录号	WOS:001086876900001
资助机构	National Magnetic Confinement Fusion Science Program of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; School of Aerospace Engineering, Tsinghua University
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/93267]
专题	宽域飞行工程科学与应用中心
通讯作者	Zhang, Wenjing; Yang, Zhengmao; Liu, Wei
作者单位	1.Jihua Lab, Foshan 528000, Peoples R China 2.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China 3.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China 4.AVIC Mfg Technol Inst, Beijing 100024, Peoples R China 5.Tsinghua Univ, Sch Mat Sci & Engn, Beijing 100084, Peoples R China
推荐引用方式 GB/T 7714	Chen, Jinhan,Li, Mingshen,Li, Kailun,et al. Cracking mechanisms in additively manufactured pure tungsten from printing single tracks, thin walls and cubes[J]. MATERIALS & DESIGN,2023,234:17.
APA	Chen, Jinhan.,Li, Mingshen.,Li, Kailun.,Zhang, Wenjing.,Yang, Zhengmao.,...&Liu, Wei.(2023).Cracking mechanisms in additively manufactured pure tungsten from printing single tracks, thin walls and cubes.MATERIALS & DESIGN,234,17.
MLA	Chen, Jinhan,et al."Cracking mechanisms in additively manufactured pure tungsten from printing single tracks, thin walls and cubes".MATERIALS & DESIGN 234(2023):17.