Research on Formation Process of Keyhole During Fiber Laser Deep Penetration Welding

Le Zhao; Xue Han; Jianglin Zou; Kai Zheng; Rongshi Xiao; Qiang Wu

doi:10.3788/LOP57.071402

[1] Li M, Zhang W, Hua X M et al. Investigation of plasma and metal transfer dynamic behavior during fiber laser GMAW-P hybrid welding[J]. Chinese Journal of Lasers, 44, 0402008(2017).

[2] Ren Y, Wu Q, Zou J L et al. Real-time monitoring of coaxial protection fiber laser welding of austenitic stainless steels[J]. Chinese Journal of Lasers, 44, 0502003(2017).

[3] Xin J J, Fang C, Song Y T et al. Autogenous laser welding of 20-mm-thick 316LN stainless steel plate by ultra high power fiber lasers[J]. Chinese Journal of Lasers, 45, 0502007(2018).

[4] Wang J, Wang C M, Meng X X et al. Study on the periodic oscillation of plasma/vapour induced during high power fibre laser penetration welding[J]. Optics & Laser Technology, 44, 67-70(2012).

[5] Gao M, Chen C, Hu M et al. Characteristics of plasma plume in fiber laser welding of aluminum alloy[J]. Applied Surface Science, 326, 181-186(2015).

[6] Zhao L, Tsukamoto S, Arakane G et al. Influence of welding parameters on weld depth and porosity in high power fiber laser welding[J]. Chinese Journal of Lasers, 40, 1103004(2013).

[7] Zou J L, Yang W X, Wu S K et al. Effect of plume on weld penetration during high-power fiber laser welding[J]. Journal of Laser Applications, 28, 022003(2016).

[8] Martin B, Loredo A, Pilloz M et al. Characterisation of CW Nd∶YAG laser keyhole dynamics[J]. Optics & Laser Technology, 33, 201-207(2001).

[9] Jin X Z, Zeng L C, Cheng Y Y. Direct observation of keyhole plasma characteristics in deep penetration laser welding of aluminum alloy 6016[J]. Journal of Physics D: Applied Physics, 45, 245205(2012).

[10] Katayama S, Kawahito Y, Mizutani M. Elucidation of laser welding phenomena and factors affecting weld penetration and welding defects[J]. Physics Procedia, 5, 9-17(2010).

[11] Semak V V, Bragg W D, Damkroger B et al. Transient model for the keyhole during laser welding[J]. Journal of Physics D: Applied Physics, 32, L61-L64(1999).

[12] Wang H Z, Zou Y. Microscale interaction between laser and metal powder in powder-bed additive manufacturing: conduction mode versus keyhole mode[J]. International Journal of Heat and Mass Transfer, 142, 118473(2019).

[13] Semak V V, Steele R J, Fuerschbach P W et al. Role of beam absorption in plasma during laser welding[J]. Journal of Physics D: Applied Physics, 33, 1179-1185(2000).

[14] Luo M, Shin Y C. Vision-based weld pool boundary extraction and width measurement during keyhole fiber laser welding[J]. Optics and Lasers in Engineering, 64, 59-70(2015).

[15] Zhang Y, Chen G Y, Wei H Y et al. A novel “sandwich” method for observation of the keyhole in deep penetration laser welding[J]. Optics and Lasers in Engineering, 46, 133-139(2008).

[16] Fujinaga S, Takenaka H, Narikiyo T et al. Direct observation of keyhole behaviour during pulse modulated high-power Nd∶YAG laser irradiation[J]. Journal of Physics D: Applied Physics, 33, 492-497(2000).

[17] Courtois M, Carin M, Masson P L et al. A new approach to compute multi-reflections of laser beam in a keyhole for heat transfer and fluid flow modelling in laser welding[J]. Journal of Physics D: Applied Physics, 46, 505305(2013).

[18] Kaplan A F H, Matti R S. Absorption peaks depending on topology of the keyhole front and wavelength[J]. Journal of Laser Applications, 27, S29012(2015).