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Proceedings Paper

Three-dimensional simulation transient keyhole evolution during laser keyhole welding
Author(s): Shengyong Pang; Liliang Chen; Yajun Yin; Tao Chen; Jianxin Zhou; Dunming Liao; Lunji Hu
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Paper Abstract

Laser keyhole welding process is not well understood because the related physics are too complex. Numerical simulation of transient keyhole evolution provides fundamental data needed to improve understanding of the mechanisms of porosity formation during laser welding. In this paper, a three dimensional mathematical model was proposed to simulate the keyhole formation process of laser welding. The coupled effects of multi-reflections Fresnel absorption of keyhole, heat conduction, heat convection, heat radiation and Knudsen jump boundary conditions on the liquid-vapor evaporation interface were considered in this model. A level set method and a fast sweeping method were developed to solve the model. The transient keyhole shape, the surface recession speed due to evaporation and the thermal distribution of keyhole wall were investigated. The time-varied surface tension force of keyhole wall was also calculated.

Paper Details

Date Published: 21 October 2009
PDF: 10 pages
Proc. SPIE 7515, Photonics and Optoelectronics Meetings (POEM) 2009: Industry Lasers and Applications, 75150T (21 October 2009); doi: 10.1117/12.843202
Show Author Affiliations
Shengyong Pang, Huazhong Univ. of Science and Technology (China)
Liliang Chen, Huazhong Univ. of Science and Technology (China)
Yajun Yin, Huazhong Univ. of Science and Technology (China)
Tao Chen, Huazhong Univ. of Science and Technology (China)
Jianxin Zhou, Huazhong Univ. of Science and Technology (China)
Dunming Liao, Huazhong Univ. of Science and Technology (China)
Lunji Hu, Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 7515:
Photonics and Optoelectronics Meetings (POEM) 2009: Industry Lasers and Applications
Dianyuan Fan; Horst Weber; Xiao Zhu; Dongsheng Jiang; Xiaochun Xiao; Weiwei Dong; Desheng Xu, Editor(s)

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