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Investigation of thermal behavior and fluid dynamics within molten pool during quasi-continuous-wave laser directed energy deposition

文献类型：期刊论文

作者Chen B(陈博)3,5; He XL(何秀丽)2,3,4,5; Dong BX(董斌鑫)3,5; Bian YH(边艳华)2,3,5; Li SX(李少霞)2,3,5; Pan, Sining1; Yu G(虞钢)2,3,4,5
刊名INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
出版日期2025-05-15
卷号241页码:15
关键词Directed energy deposition Quasi-continuous-wave laser Molten pool Fluid dynamics Dimensionless numbers
ISSN号0017-9310
DOI10.1016/j.ijheatmasstransfer.2025.126704
通讯作者He, Xiuli(xlhe@imech.ac.cn)
英文摘要The quasi-continuous-wave laser directed energy deposition (QCW-DED), a form of directed energy deposition (DED), has garnered growing interest in recent years due to its ability to reduce thermal deformation and improve the performance of manufactured components. However, the interaction between the quasi-continuouswave (QCW) laser and the molten pool surface, and its subsequent effects on the dynamics and morphology of the molten pool, is still not clear. In this work, a coupled ray-tracing computational fluid dynamics (CFD) model, which integrates a laser-powder interaction model and material deposition model, is developed to study the multi-physics coupling characteristics in QCW-DED process. The incident angle between the laser rays and molten pool surface was quantified and the corresponding laser absorptivity was analyzed. After accounting for the influence of laser-surface interaction, the heat transfer and fluid dynamics within the molten pool were subsequently investigated. Several dimensionless numbers, including the Fourier number (Fo), Peclet number (Pe), Marangoni number (Ma), and Grashof number (Gr), were employed to elucidate the physical mechanisms underlying the evolution of the molten pool. The results show that the heat transfer within the molten pool is controlled alternately by thermal convection and thermal conduction during the QCW-DED process. Furthermore, the Marangoni effect and buoyancy effect are weaker in the QCW-DED process compared to the continuous-wave laser directed energy deposition (CW-DED) process. However, the molten pool has a stronger heat dissipation capability in the QCW-DED process. Finally, the calculated molten pool geometry shows good agreement with the experimental results with the relative error less than 14.5%. This work provides a deeper insight into laser-surface interaction and the dynamics behavior within the molten pool during the QCW-DED process. The developed model can also serve as a fundamental tool for understanding the forming mechanism, predicting the deposition quality and optimizing the process of QCW-DED.
分类号一类
WOS关键词FLOW ; HEAT
资助项目National Key R & D Program of China[2023YFB4603701] ; Research Project of Guangdong Aerospace Research Academy[GARA2022001000] ; National Natural Science Foundation of China[52065018]
WOS研究方向Thermodynamics ; Engineering ; Mechanics
语种英语
WOS记录号WOS:001399765400001
资助机构National Key R & D Program of China ; Research Project of Guangdong Aerospace Research Academy ; National Natural Science Foundation of China
其他责任者He, Xiuli
源URL[http://dspace.imech.ac.cn/handle/311007/98192]  
专题宽域飞行工程科学与应用中心
作者单位1.Hezhou Univ, Sch Artificial Intelligence, Hezhou 542899, Peoples R China
2.Guangdong Aerosp Res Acad, Guangzhou 511458, Peoples R China;
3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100190, Peoples R China;
4.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100190, Peoples R China;
5.Chinese Acad Sci, Inst Mech, LMFS, Beijing 100190, Peoples R China;
推荐引用方式
GB/T 7714		 Chen B,He XL,Dong BX,et al. Investigation of thermal behavior and fluid dynamics within molten pool during quasi-continuous-wave laser directed energy deposition[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2025,241:15.
APA 陈博.,何秀丽.,董斌鑫.,边艳华.,李少霞.,...&虞钢.(2025).Investigation of thermal behavior and fluid dynamics within molten pool during quasi-continuous-wave laser directed energy deposition.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,241,15.
MLA 陈博,et al."Investigation of thermal behavior and fluid dynamics within molten pool during quasi-continuous-wave laser directed energy deposition".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 241(2025):15.

入库方式： OAI收割

来源：力学研究所

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