A complete model of keyhole and melt pool dynamics to analyze instabilities and collapse during laser welding
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- Mickael Courtois
- ArcelorMittal Global R&D Montataire , F-60160 Montataire, France and , EA 4250, LIMATB, F-56100 Lorient, France
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- Muriel Carin
- University of Bretagne-Sud , EA 4250, LIMATB, F-56100 Lorient, France
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- Philippe Le Masson
- University of Bretagne-Sud , EA 4250, LIMATB, F-56100 Lorient, France
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- Sadok Gaied
- ArcelorMittal Global R&D Montataire , F-60160 Montataire, France
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- Mikhaël Balabane
- Institut Galilée Université Paris 13 , F-93430 Villetaneuse, France
書誌事項
- 公開日
- 2014-07-08
- DOI
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- 10.2351/1.4886835
- 公開者
- Laser Institute of America
この論文をさがす
説明
<jats:p>A complete modeling of heat and fluid flow applied to laser welding regimes is proposed. This model has been developed using only a graphical user interface of a finite element commercial code and can be easily usable in industrial R&D environments. The model takes into account the three phases of the matter: the vaporized metal, the liquid phase, and the solid base. The liquid/vapor interface is tracked using the Level-Set method. To model the energy deposition, a new approach is proposed which consists of treating laser under its wave form by solving Maxwell's equations. All these physics are coupled and solved simultaneously in Comsol Multyphysics®. The simulations show keyhole oscillations and the formation of porosity. A comparison of melt pool shapes evolution calculated from the simulations and experimental macrographs shows good correlation. Finally, the results of a three-dimensional simulation of a laser welding process are presented. The well-known phenomenon of humping is clearly shown by the model.</jats:p>
収録刊行物
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- Journal of Laser Applications
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Journal of Laser Applications 26 (4), 2014-07-08
Laser Institute of America
