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Formation mechanism of pore defects and surface ripples under different process parameters via laser powder bed fusion by numerical simulation and experimental verification

文献类型：期刊论文

作者Duan, Xianyin2; Long, Tao2; Zhu, Kunpeng1; Li, Wei2; Fuh, Ying Hsi Jerry3
刊名INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
出版日期2024-10-03
关键词Pore defects Melt pool evolution Surface ripples Laser powder bed fusion Process parameters
ISSN号0268-3768
DOI10.1007/s00170-024-14516-5
通讯作者Duan, Xianyin(xyduan@wust.edu.cn) ; Zhu, Kunpeng(zhukp@iamt.ac.cn) ; Li, Wei(wei.ei@wust.edu.cn)
英文摘要The formation mechanism of pore defects and surface ripples takes a crucial position in quality control during the laser powder bed fusion process. This paper explores the evolution of the melt pool in the LPBF process and elucidates the impact of flow state and temperature field distribution on the melt pool with different process parameters. Through computational fluid dynamics methodology, the study clarifies the formation mechanism of pore defects and surface ripples. The discrete element method was applied to simulate the powder bed using a set of processing parameters. The free surface of the melt pool was then calculated employing the volume of fluid method. It was found that surface ripples on the melt pool and irregular pore defects in the lap joints appeared due to the lack of fusion at a laser energy density of 32 J/mm3 under the pre-set conditions. As the laser scanning speed dropped to 600 mm/s, keyholes were generated inside the melt pool due to the recoil pressure. Similar phenomena of pore defects and surface ripples were observed in the experiments. The measured and simulated average widths of the molten track showed good agreement, with relative errors of less than 6%, confirming the accuracy of the simulated formation. Our work sheds new light on the quality control of LPBF fabricated parts for the future.
WOS关键词INCONEL 718 ; ENERGY DENSITY ; MELTING SLM ; MICROSTRUCTURE
资助项目National Natural Science Foundation of China[51605346] ; Key research and development program of Hubei Province[2022BAA059]
WOS研究方向Automation & Control Systems ; Engineering
语种英语
WOS记录号WOS:001325727200001
出版者SPRINGER LONDON LTD
资助机构National Natural Science Foundation of China ; Key research and development program of Hubei Province
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/135779]  
专题中国科学院合肥物质科学研究院
通讯作者Duan, Xianyin; Zhu, Kunpeng; Li, Wei
作者单位1.Chinese Acad Sci, Inst Intelligent Machines, Hefei Inst Phys Sci, Hefei 230031, Peoples R China
2.Wuhan Univ Sci & Technol, Key Lab Met Equipment & Control Technol, Minist Educ, Wuhan 430081, Peoples R China
3.Natl Univ Singapore NUS, Dept Mech Engn, Singapore 117575, Singapore
推荐引用方式
GB/T 7714		 Duan, Xianyin,Long, Tao,Zhu, Kunpeng,et al. Formation mechanism of pore defects and surface ripples under different process parameters via laser powder bed fusion by numerical simulation and experimental verification[J]. INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY,2024.
APA Duan, Xianyin,Long, Tao,Zhu, Kunpeng,Li, Wei,&Fuh, Ying Hsi Jerry.(2024).Formation mechanism of pore defects and surface ripples under different process parameters via laser powder bed fusion by numerical simulation and experimental verification.INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY.
MLA Duan, Xianyin,et al."Formation mechanism of pore defects and surface ripples under different process parameters via laser powder bed fusion by numerical simulation and experimental verification".INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY (2024).

入库方式： OAI收割

来源：合肥物质科学研究院

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