Investigation of microstructure evolution process in circular shaped oscillating laser welding of Inconel 718 superalloy

被引：23
|
作者：
Ai, Yuewei [1 ,2 ]
Yan, Yachao [1 ,2 ]
Dong, Guangyu [1 ,2 ]
Han, Shibo [1 ,2 ]
机构：
[1] Cent South Univ, Sch Traff & Transportat Engn, Changsha 410075, Peoples R China
[2] Cent South Univ, Key Lab Traff Safety Track, Minist Educ, Changsha 410075, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2023年 / 216卷
基金：
中国国家自然科学基金;
关键词：
Laser welding; Oscillating laser; Phase field; Microstructure morphologies; IN718; superalloy; PHASE-FIELD; HEAT-TRANSFER; FLUID-FLOW; POOL; ALLOY; BEAM; GROWTH; PREDICTION; MORPHOLOGY; MECHANISM;
D O I：
10.1016/j.ijheatmasstransfer.2023.124522
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
A macro-micro coupling model of microstructure dynamic evolution for circular shaped oscillating laser welding of Inconel 718 superalloy is developed in this paper to investigate the evolution process of columnar crystals under the effect of oscillating laser beam. The macroscale heat transfer model is established to obtain the characteristics of temperature distribution in molten pool and the microscale phase field model is utilized to explore the microstructure evolution during the oscillating laser welding. The transient solidification conditions model based on the temperature field of the circular shaped oscillating laser welding is used for calculating the dynamic solidification conditions which consist of the temperature gradient and the solidification rate. The microstructure evolution process and morphologies in circular shaped oscillating laser welding of Inconel 718 superalloy are obtained by the macro-micro coupling model and the calculated results are in good agreement with the experimental results. The characteristics of the microstructure under the action of the circular shaped oscillating laser beam are analyzed. The proposed model can be used to predict the microstructure of weld formed in the oscillating laser welding and provide the optimal process conditions for improving the welded joint quality in practical manufacturing.
引用
收藏
页数：15
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