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Effects of laser beam oscillation on molten pool formation and solidification characteristic in directed energy deposition of Inconel 718 alloy

文献类型：期刊论文

作者Chen B(陈博)2,4; Dong BX(董斌鑫)2,4; Bian YH(边艳华)2,4; Li SX(李少霞)2,4; Tian CX(田崇鑫)2,4; Li ZY(李志永)2,4; Li, Peng1; He XL(何秀丽)2,3,4; Yu G(虞钢)2,3,4
刊名JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
出版日期2025-09-01
卷号38页码:3482-3499
关键词Directed energy deposition Laser beam oscillation Inconel 718 Computational fluid dynamics (CFD) Thermal-fluid behavior Solidification characteristic
ISSN号2238-7854
DOI10.1016/j.jmrt.2025.08.138
通讯作者Dong, Binxin(dongbinxin@imech.ac.cn) ; He, Xiuli(xlhe@imech.ac.cn)
英文摘要Directed energy deposition with laser beam oscillation (DED-LBO) is a promising technology to modify the solidification structure and improve the deposition quality by introducing an oscillating laser. In this study, a multiphase computational fluid dynamics (CFD) model incorporating a ray-tracing algorithm was developed to simulate the DED-LBO process of Inconel 718 powder on a 316 L stainless steel substrate, based on several reasonable assumptions. The results show that the average interaction angle between the molten pool surface and the laser beam, as well as the laser absorptivity, fluctuates periodically over time due to the oscillating laser. The larger the oscillation amplitude, the larger the surface area of the molten pool, resulting in more Inconel 718 powder being melted and a reduction in laser absorptivity. The periodic heat input induced by the oscillating laser beam causes fluctuations in temperature, fluid velocity, solute distribution uniformity, and molten pool volume, all of which decrease with increasing oscillation amplitude, ultimately leading to the formation of distinct solidification textures. The cooling rate decreases with an increase in oscillation amplitude, which results in finer grain size at lower oscillation amplitudes. Furthermore, the oscillating laser beam demonstrates potential in modifying the direction of columnar grain growth. The columnar crystals grow at an angle with the build direction at a smaller oscillation amplitude (0.4 mm), whereas at a larger amplitude (1.2 mm), they are aligned nearly parallel. This study enhances the understanding of laser-material interaction and thermal-fluid-solute transport behavior, as well as their role in molten pool formation and solidification during the DED-LBO process.
分类号一类
WOS关键词TRANSPORT PHENOMENA ; SIMULATION ; MODEL
资助项目National Key R & D Program of China[2023YFB4603701] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB0910203] ; National Natural Science Foundation of China[12472123] ; National Natural Science Foundation of China[12202448]
WOS研究方向Materials Science ; Metallurgy & Metallurgical Engineering
语种英语
WOS记录号WOS:001564019900009
资助机构National Key R & D Program of China ; Strategic Priority Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China
其他责任者董斌鑫 ; 何秀丽
源URL[http://dspace.imech.ac.cn/handle/311007/103665]  
专题宽域飞行工程科学与应用中心
作者单位1.Shaanxi Baoguang Vacuum Elect Device Co Ltd, Baoji 721016, Peoples R China
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100190, Peoples R China;
3.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100190, Peoples R China;
4.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China;
推荐引用方式
GB/T 7714		 Chen B,Dong BX,Bian YH,et al. Effects of laser beam oscillation on molten pool formation and solidification characteristic in directed energy deposition of Inconel 718 alloy[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2025,38:3482-3499.
APA 陈博.,董斌鑫.,边艳华.,李少霞.,田崇鑫.,...&虞钢.(2025).Effects of laser beam oscillation on molten pool formation and solidification characteristic in directed energy deposition of Inconel 718 alloy.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,38,3482-3499.
MLA 陈博,et al."Effects of laser beam oscillation on molten pool formation and solidification characteristic in directed energy deposition of Inconel 718 alloy".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 38(2025):3482-3499.

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来源：力学研究所

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