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

文献类型：期刊论文

作者Chen, Jinhan4,5; Li, Mingshen5; Li, Kailun3; Zhang, Wenjing5; Yang, Zhengmao2; Zhao, Congcong1; Ma, Jing5; Liu, Wei5; Liu W(刘巍); Yang ZM(杨正茂)
刊名MATERIALS & DESIGN
出版日期2023-10-01
卷号234页码:17
ISSN号0264-1275
关键词Cracking Tungsten Additive manufacturing Grain boundaries Microstructures Geometric effect
DOI10.1016/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.
WOS关键词POWDER BED FUSION ; RESIDUAL-STRESS ; LASER ; MICROSTRUCTURE ; DENSIFICATION ; SUPPRESSION ; PERFORMANCE ; PARAMETERS ; BEHAVIOR
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
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.,...&杨正茂.(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.

入库方式： OAI收割

来源：力学研究所

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