[1] [1] Xie J. Dual beam laser welding［J］. Welding Journal, 2002, 81(9): 223-230.

[2] [2] Li Liqun, Chen Yanbin, Tao Wang. Research on dual-beam welding characteristics of aluminum alloy［J］. Chinese J Lasers, 2008, 35(11): 1783-1788.

[3] [3] Chen S H, Zhai Z L, Huang J H, et al. Interface microstructure and fracture behavior of single/dual-beam laser welded steel-Al dissimilar joint produced with copper interlayer［J］. The International Journal of Advanced Manufacturing Technology, 2016, 82(1): 631-643.

[4] [4] Lei Zhenglong, Li Ying, Chen Yanbin, et al. Effect of process parameters on porosity formation ratio in dual-beam laser welding of aluminum alloys with filler wire［J］. Transactions of the China Welding Institution, 2013, 34(2): 40-44.

[5] [5] Harooni M, Carlson B, Kovacevic R. Dual-beam laser welding of AZ31B magnesium alloy in zero-gap lap joint configuration［J］. Optics & Laser Technology, 2014, 56(5): 247-255.

[6] [6] Drezet J M, Lima M S F, Wagnière J D, et al. Crack-free aluminium alloy welds using a twin laser process［C］. Proceedings of the International Institute of Welding Conference, 2008: 87-94.

[7] [7] Shi Y, Zhang H, Watanabe T, et al. CW/PW dual-beam YAG laser welding of steel/aluminum alloy sheets［J］. Optics and Laser Engineering, 2010, 48(7): 732-736.

[8] [8] Yang Jing, Li Xiaoyan, Chen Li, et al. Microstructure and properties of twin spot laser welded joints of 1420 Al-Li alloy［J］. Rare Metal Materials and Engineering, 2011, 40(5): 871-874.

[9] [9] Haboudou A, Peyre P, Vannes A B, et al. Reduction of porosity content generated during Nd∶YAG laser welding of A356 and AA5083 aluminium alloys［J］. Materials Science and Engineering: A, 2003, 363(1-2): 40-52.

[10] [10] Shibata K, Iwase T, Sakamoto H, et al. Study on behavior in twin spot beam welding of aluminum alloys by means of X-ray observation［J］. Quarterly Journal of the Japan Welding Society, 2003, 21(2): 204-212.

[11] [11] Shibata K, Iwase T, Sakamoto H, et al. Process stabilization by dual focus laser welding of aluminum alloys for car body［C］. SPIE, 2003, 5121: 376-384.

[12] [12] Hu J, Tsai H L. Fluid flow and weld pool dynamics in dual-beam laser keyhole welding［C］. ASME 2003 International Mechanical Engineering Congress and Exposition, 2003, 3: 151-159.

[13] [13] Zhou J, Tsai H L. Investigation of fluid flow and heat transfer in 3D dual-beam laser keyhole welding［C］. ASME 2010 International Manufacturing Science and Engineering Conference, 2010, 2: 247-254.

[14] [14] Fabbro R, Hamadou M, Coste F. Metallic vapor ejection effect on melt pool dynamics in deep penetration laser welding［J］. Journal of Laser Applications, 2004, 16(1): 16-19.

[15] [15] Xie J. Welding morphology and thermal modeling in dual-beam laser welding［J］. Welding Journal, 2002, 81: 283-290.