[1] [1] FUJINAGA S, OHASHI R, URAKAMI T, et al. Development of all position YAG laser butt welding process with filler wire［J］. Quarterly Journal of the Japan Welding Society, 2004, 22(3): 369-374.

[2] [2] SOHAIL M, HAN S W, NA S J, et al. Numerical investigation of energy input characteristics for high-power fiber laser welding at different positions［J］. The International Journal of Advanced Manufacturing Technology, 2015, 80(5-8): 931-946.

[3] [3] NaS,Han S, Muhammad S, et al. Flow and Bead Formation Characteristics in High Power Laser Welding at Different Welding Positions［J］. Proceeding of Lasers in Manufacturing Conference (Invited talk) 2015.

[4] [4] BACHMANN M, AVILOV V, GUMENYUK A, et al. Experimental and numerical investigation of an electromagnetic weld pool control for laser beam welding［J］. Physics Procedia, 2014, 56: 515-524.

[5] [5] BACHMANN M, AVILOV V, GUMENYUK A, et al. Experimental and numerical investigation of an electromagnetic weld pool support system for high power laser beam welding of austenitic stainless steel［J］. Journal of Materials Processing Technology, 2014, 214(3): 578-591.

[6] [6] KATAYAMA S, IDO R, NISHIMOTO K, et al. Full penetration welding of thick high tensile strength steel plate with high-power disk laser in low vacuum［J］. Welding International, 2018, 32(5): 289-302.

[7] [7] LUO Y, TANG X H, DENG S J, et al. Dynamic coupling between molten pool and metallic vapor ejection for fiber laser welding under subatmospheric pressure［J］. Journal of Materials Processing Technology, 2016, 229: 431-438.

[8] [8] GUO W, LIU Q, FRANCIS J A, et al. Comparison of laser welds in thick section S700 high-strength steel manufactured in flat (1G) and horizontal (2G) positions［J］. CIRP Annals, 2015, 64(1): 197-200.

[9] [9] POWELL J, ILAR T, FROSTEVARG J, et al. Weld root instabilities in fiber laser welding［J］. Journal of Laser Applications, 2015, 27(S2): S29008.

[10] [10] HAUG P, ROMINGER V, SPEKER N, et al. Influence of laser wavelength on melt bath dynamics and resulting seam quality at welding of thick plates［J］. Physics Procedia, 2013, 41: 49-58.

[11] [11] ARAKANE G, TSUKAMOTO S, HONDA H, et al. Effect of welding atmosphere at bottom surface on welding phenomenan in full penetration laser welding of thick plate［J］. Journal of High Temperature Society, 2006, 32(2): 137-144.

[12] [12] ZHAO L, TSUKAMOTO S, ARAKANE G, et al. Prevention of porosity by oxygen addition in fibre laser and fibre laser-GMA hybrid welding［J］. Science and Technology of Welding and Joining, 2014, 19(2): 91-97.

[13] [13] KAWAGUCHI I, TSUKAMOTO S, ARAKANE G, et al. Suppression of porosity by laser power modulation［J］. Quarterly Journal of the Japan Welding Society, 2007, 25(2): 328-335.

[14] [14] ZHANG L J, ZHANG J X, GUMENYUK A, et al. Numerical simulation of full penetration laser welding of thick steel plate with high power high brightness laser［J］. Journal of Materials Processing Technology, 2014, 214(8): 1710-1720.

[15] [15] Rethmeier M, Gumenyuk A, Gook S. Laser-hybrid welding for pipe production and pipe laying of thick large diameter［C］. Proceedings of the 7th Asia-Pacific International IIW Congress. Singapore.417-423, July 8th-10th, 2008.

[16] [16] GOOK S, GUMENYUK A, RETHMEIER M. Hybrid laser arc welding of X80 and X120 steel grade［J］. Science and Technology of Welding and Joining, 2014, 19(1): 15-24.

[17] [17] Akselsen O M, Wiklund G, Ostby E, et al. A first assessment of laser hybrid welding of 420 mpa steel for offshore structure application［C］. In 14th NOLAMP Conference: The 14th Nordic Laser Materials Processing Conference, Gothenburg, Sweden. Lulea: Lulea technical university, August 26th-28th, 2013.

[18] [18] ZHAO L, SUGINO T, ARAKANE G, et al. Influence of welding parameters on distribution of wire feeding elements in CO2 laser GMA hybrid welding［J］. Science and Technology of Welding and Joining, 2009, 14(5): 457-467.

[21] [21] HIDAKA T, SUENAGA K, OKAZAKI Y, et al. Influence of oxides on microstructure and notch toughness of weld metal with flux-cored wires for high strength steel［J］. Quarterly Journal of the Japan Welding Society, 2009, 27(2): 154s-157s.