Calculation method of laser energy density of arbitrary shaped keyhole during deep penetration laser welding

PANG Sheng-yong; CHEN Li-liang; CHEN Tao; YIN Ya-jun; HU Lun-ji; LIU Jian-hua

doi:10.3969/j.issn.1001-3806.2010.O5.011

A new ray tracing method based on Level Set method and finite difference model was proposed to calculate the laser density distribution of the keyhole wall during the transient keyhole evolution process of deep penetration laser welding.The multiple reflections Fresnel absorption of the keyhole wall and the inverse bremsstrahlung absorption of the vapor plume/plasma were simultaneously considered in this new method. The results demonstrate that the presented method can be used to calculate the laser density distribution of arbitrarily shaped keyhole accurately.

Calculation method of laser energy density of arbitrary shaped keyhole during deep penetration laser welding

Corresponding author: CHEN Li-liang, lilangchen@mailhurt.edu.cn;

1. State Key Laboratory of Material Processing and Die & Mould Technology, School of Material Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

Received Date: 2009-09-15

Accepted Date: 2009-10-19

Available Online: 2010-09-25

Abstract: A new ray tracing method based on Level Set method and finite difference model was proposed to calculate the laser density distribution of the keyhole wall during the transient keyhole evolution process of deep penetration laser welding.The multiple reflections Fresnel absorption of the keyhole wall and the inverse bremsstrahlung absorption of the vapor plume/plasma were simultaneously considered in this new method. The results demonstrate that the presented method can be used to calculate the laser density distribution of arbitrarily shaped keyhole accurately.

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Reference (18)

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Calculation method of laser energy density of arbitrary shaped keyhole during deep penetration laser welding

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