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Investigation of thermal behavior of powder stream and molten pool during laser-based directed energy deposition

文献类型：期刊论文

作者Chen, Bo2,4; Dong, Binxin2,4; Bian, Yanhua1,2,4; Li, Shaoxia1,2,4; Tian, Chongxin1,2,4; He, Xiuli1,2,3,4; Yu, Gang1,2,3,4
刊名POWDER TECHNOLOGY
出版日期2024-02-01
卷号434页码:16
ISSN号0032-5910
关键词Directed energy deposition Laser -powder interaction Powder concentration Powder temperature Heat transport
DOI10.1016/j.powtec.2024.119385
通讯作者He, Xiuli(xlhe@imech.ac.cn) ; Yu, Gang(gyu@imech.ac.cn)
英文摘要Laser -powder interaction and molten pool evolution are two main physical processes in laser -based directed energy deposition (L-DED), which greatly affect the morphology and quality of the deposition layer. In this research, a comprehensive three-dimensional analytical -numerical model which integrates a laser -powder interaction model and material deposition model is developed to study the multi -physics coupling characteristics in L-DED process. The concentration of the powder stream is modeled based on conservation of mass and is in good agreement with the experimental result which is captured by high-speed camera. The effects of main parameters, including laser power, powder feeding rate, powder feeding angle and defocus length on the laser attenuation and the temperature distribution of the in-flight powder particles are analyzed. The results show that the laser attenuation rate increases from 0.72% to 1.36% with the powder feeding angle increasing from 45 deg. to 65 deg-. However, the laser attenuation rate is almost the same with the defocus length of 25 mm, 35 mm and 45 mm. Moreover, the peak powder temperature on the deposition surface increases with the increase of powder feeding angle and decrease of defocus length. Accordingly, the heat and mass input conditions at the molten pool surface for the material deposition model, including powder mass flux, effective laser intensity and powder temperature are obtained from the laser -powder interaction model. The heat transport and fluid dynamics of the molten pool are discussed based on the calculated results from material deposition model. Finally, the calculated molten pool geometry shows good agreement with the experimental results with the relative error <8.5%. This work is helpful in process optimization from the point of view of adjusting the parameters related to the powder stream and deeper understanding of laser -powder interaction and molten pool evolution during the L-DED process.
WOS关键词NUMERICAL-SIMULATION ; TRANSPORT PHENOMENA ; INCONEL 718 ; FLOW ; SOLIDIFICATION ; MODEL
资助项目National Key Research and Develop- ment Program of China[2023YFB4603701] ; Research Project of Guangdong Aerospace Research Academy[GARA2022001000]
WOS研究方向Engineering
语种英语
WOS记录号WOS:001162759000001
资助机构National Key Research and Develop- ment Program of China ; Research Project of Guangdong Aerospace Research Academy
源URL[http://dspace.imech.ac.cn/handle/311007/94430]  
专题宽域飞行工程科学与应用中心
通讯作者He, Xiuli; Yu, Gang
作者单位1.Guangdong Aerosp Res Acad, Guangzhou 511458, 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.Inst Mech, Chinese Acad Sci, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Chen, Bo,Dong, Binxin,Bian, Yanhua,et al. Investigation of thermal behavior of powder stream and molten pool during laser-based directed energy deposition[J]. POWDER TECHNOLOGY,2024,434:16.
APA Chen, Bo.,Dong, Binxin.,Bian, Yanhua.,Li, Shaoxia.,Tian, Chongxin.,...&Yu, Gang.(2024).Investigation of thermal behavior of powder stream and molten pool during laser-based directed energy deposition.POWDER TECHNOLOGY,434,16.
MLA Chen, Bo,et al."Investigation of thermal behavior of powder stream and molten pool during laser-based directed energy deposition".POWDER TECHNOLOGY 434(2024):16.

入库方式： OAI收割

来源：力学研究所

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