Study of the Effect of Heat Source Separation Distance on Plasma Physical Properties in Laser-Pulsed GMAW Hybrid Welding Based on Spectral Diagnosis Technique
LIAO Wei1,2, HUA Xue-ming1,2*, ZHANG Wang1,2, LI Fang1,2
1. Welding Engineering Technology Research Institute, School of Materials Science and Engineering，Shanghai Jiaotong University, Shanghai 200240, China 2. Shanghai Key Laboratory of Materials Laser Processing and Modification，Shanghai Jiaotong University, Shanghai 200240, China
Abstract：In the present paper, the authors calculated the plasma’s peak electron temperatures under different heat source separation distance in laser- pulse GMAW hybrid welding based on Boltzmann spectrometry. Plasma’s peak electron densities under the corresponding conditions were also calculated by using the Stark width of the plasma spectrum. Combined with high-speed photography，the effect of heat source separation distance on electron temperature and electron density was studied. The results show that with the increase in heat source separation distance, the electron temperatures and electron densities of laser plasma did not changed significantly. However, the electron temperatures of arc plasma decreased, and the electron densities of arc plasma first increased and then decreased.
[1] Liu L，Chen M. Optics and Lasers in Engineering, 2011，49(9): 1224. [2] WU Shi-kai, XIAO Rong-shi, YANG Wu-xiong(吴世凯，肖荣诗，杨武雄). Chinese Journal of Lasers(中国激光), 2010, (10): 2667. [3] Miller R，DebRoy T. Journal of Applied Physics, 1990，68(5): 2045. [4] HU Lian-hai, HUANG Jian, ZHUANG Kai(胡连海，黄 坚，庄 凯). Transactions of the China Welding Institution(焊接学报), 2010，31(2): 49. [5] GAO Ming, ZENG Xiao-yan, HU Qian-wu, et al(高 明，曾晓雁，胡乾午，等). Chinese Journal of Lasers(中国激光), 2009，34(s1): 279. [6] LIU Feng-de, ZHANG Hong, XUE Chuan(刘凤德，张 宏，薛 川). Welding(焊接), 2012(3): 18. [7] GAO Ming, ZENG Xiao-yan, YAN Jun, et al(高 明，曾晓雁，严 军，等). Laser Technology(激光技术), 2007. 31(5): 465. [8] Ribic B, Burgardt P, Debroy T. Journal of Applied Physics, 2011，109: 083301. [9] Liu L，Hao X. Journal of Physics D: Applied Physics, 2008，41(20): 205202. [10] Li Z, Wang W, WANG X, et al. Optics & Laser Technology, 2010，42(1): 132. [11] Gu X, Li H, Yang L, et al. Optics & Laser Technology, 2013，48: 246. [12] ZHENG Kai, LI Huan, YANG Li-jun, et al(郑 凯，李 桓，杨立军，等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2013，33(4): 890. [13] Zielinska S, Pellerin S, Dzierzega K, et al. Journal of Physics D: Applied Physics, 2010, 43(43): 434005. [14] ZHU Pei-chen, XIA Meng-fen(朱沛臣，夏蒙棼). Progress in Physics(物理学进展)，2001，21：88. [15] Griem H R. Plasma Spectroscopy. New York: McGraw-Hill, 1964. 1. [16] Rouffet M E, Wendt M, Goett, et al. Journal of Physics D: Applied Physics, 2010，43(43): 434003.
