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Investigation of solidification parameters and microstructure evolution in directed energy deposition with laser beam oscillation

文献类型：期刊论文

作者Chen, Bo1,3; Dong, Binxin1,3; Bian, Yanhua1,3; Li, Shaoxia1,3; Tian, Chongxin1,3; He, Xiuli1,2,3; Yu, Gang1,2,3
刊名INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
出版日期2026-02-01
卷号255页码:14
关键词Directed energy deposition Laser beam oscillation Phase field method Thermal behavior Solidification parameters Microstructure evolution
ISSN号0017-9310
DOI10.1016/j.ijheatmasstransfer.2025.127774
通讯作者Dong, Binxin(dongbinxin@imech.ac.cn) ; He, Xiuli(xlhe@imech.ac.cn)
英文摘要Laser beam oscillation offers significant potential to enhance process stability, control solidification parameters, and tailor microstructure in directed energy deposition. A coupled mesoscopic-microcosmic numerical model is utilized in this work to investigate the effect of oscillating laser beam on the solidification parameters and microstructure evolution during the directed energy deposition with laser beam oscillation (DED-LBO) process. The dynamics solidification conditions induced by the oscillating laser beam are considered in the mesoscopic thermal-fluid model. Based on the solidification parameters, the columnar-to-equiaxed transition of the microstructure is discussed, and microstructure evolution is analyzed using the microcosmic phase-field model. The results show that temperature gradient (G) and cooling rate (GR) vary transiently with the position along the laser oscillation trajectory. The microstructure is predominantly characterized by columnar grain growth, with a relative probability exceeding 85.37 %. An increase in oscillation amplitude and frequency effectively reduces both G and GR, resulting in a coarser microstructure. Good agreement is achieved between the simulated and experimental dimensions and microstructural morphologies of the deposited layers, demonstrating the validity of the developed model. The findings of this work provide valuable insight into revealing the dynamic solidification parameters under the oscillating laser beam and elucidating the physical mechanisms governing microstructure evolution under varying oscillation conditions.
WOS关键词PHASE-FIELD ; SIMULATION ; TI-6AL-4V ; GROWTH ; COLUMNAR ; MODELS
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]
WOS研究方向Thermodynamics ; Engineering ; Mechanics
语种英语
WOS记录号WOS:001573242300001
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
源URL[http://dspace.imech.ac.cn/handle/311007/104059]  
专题宽域飞行工程科学与应用中心
通讯作者Dong, Binxin; He, Xiuli
作者单位1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing, Peoples R China
3.Chinese Acad Sci, Inst Mech, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Chen, Bo,Dong, Binxin,Bian, Yanhua,et al. Investigation of solidification parameters and microstructure evolution in directed energy deposition with laser beam oscillation[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2026,255:14.
APA Chen, Bo.,Dong, Binxin.,Bian, Yanhua.,Li, Shaoxia.,Tian, Chongxin.,...&Yu, Gang.(2026).Investigation of solidification parameters and microstructure evolution in directed energy deposition with laser beam oscillation.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,255,14.
MLA Chen, Bo,et al."Investigation of solidification parameters and microstructure evolution in directed energy deposition with laser beam oscillation".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 255(2026):14.

入库方式： OAI收割

来源：力学研究所

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