| Laser Welding and Laser Processing Technology In material engineering |
| کد مقاله : 1237-NAEC |
| نویسندگان |
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شهریار ابوالحسینی *1، مهدی اردیانیان2، یاسر رجبی3، فاطمه ویسی4، زهره رجبی4 1پژوهشکده فوتونیک و فناوری کوانتومی 2عضو هیئت علمی دانشگاه دامغان 3عضو هیئت علمی دانشگاهدامغان 4پژوهشگاه علوم و فنون هسته ای |
| چکیده مقاله |
| Laser welding's precision and efficiency are well-established, yet predictive theoretical models often fail due to the decoupled treatment of its multi-physics nature. This paper develops an integrative theoretical framework that synthesizes heat transfer, molten pool fluid dynamics, and rapid solidification kinetics into a unified model. We propose a coupled system of equations governing energy deposition, Marangoni-driven flow, and phase transformation, introducing a dimensionless "Process Fidelity Number" (PFN) to characterize regime transitions. The model reveals how the interplay between laser parameters (power, speed, spot size) and material properties dictates key outcomes: weld geometry, susceptibility to defects like porosity and cracking, and final microstructure. The primary theoretical contribution is a holistic model that captures the non-linear feedback between thermal gradients, fluid flow, and solidification morphology. This framework provides a robust foundation for a priori process optimization, bridging a critical gap between isolated physical models and the complex reality of laser welding, with significant implications for advanced manufacturing in aerospace and automotive sectors. |
| کلیدواژه ها |
| material processing, laser welding, material |
| وضعیت: پذیرفته شده |
