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In order to understand in depth plasma behavior during ultra-high power fiber laser deep penetration welding, the plasma inside and outside the keyhole is observed, and the spectrum of fiber laser-induced plasma is measured and analyzed. Based on the measured data of plasma, the electron temperature and electron density, ionization degree and pressure are calculated, and the characteristics of plasma parameters at different values of keyhole depth and outside the keyhole are investigated. The results indicate that the distribution of plasma inside the keyhole is uneven, and the vapor plume is much bigger outside the keyhole. The spectrum of plasma show that the fiber laser-induced plasma is weakly ionized and radiates a few spectral lines. The further calculation results also confirm that the plasma induced by fiber laser is in a weakly ionized state. However, the electron density of plasma still stays in a high level, and the transient pressure of plasma is up to hundreds of times as large as atmospheric pressure.
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Keywords:
- fiber laser /
- deep penetration welding /
- plasma /
- pressure
[1] Tang X H, Zhu H H, Zhu G F, Li S M 2000 China Mech. Eng. 11 741 (in Chinese) [唐霞辉, 朱海红, 朱国富, 李适民 2000 中国机械工程 11 741]
[2] Su Y D 2000 China Mech. Eng. 11 1389 (in Chinese) [苏彦东 2000 中国机械工程 11 1389]
[3] Zhang Y, Chen G Y, Li L J 2008 Manuf. Technol. Machine Tool 3 98 (in Chinese)[张屹, 陈根余, 李力钧 2008 制造技术与机床 3 98]
[4] Zhao Q, Wu Q B, Wang W 2006 Infrared Laser Eng. 35(S3) 70 (in Chinese) [赵强, 吴清彬, 王伟 2006 红外与激光工程 35(S3) 70]
[5] Zhang Y, Li L J, Zhang G 2005 J. Phys. D: Appl. Phys. 38 703
[6] Greses J, Hilton P A, Barlow C Y, Steen W M 2003 Proceedings International Congress on Applications of Lasers and Electro-Optics (Orlando: Laser Institute of America) p546
[7] Kawahito Y, Matsumoto N, Mizutani M, Katayama S 2008 Sci. Technol. Weld. Joining 13 744
[8] Kulish M, Fertman A, Golubev A, Tauschwitz A, Turtikov V 2011 Rev. Sci. Instrum. 72 2294
[9] Bedenko D V, Kovalev O B, Krivtsun I V 2010 J. Phys. D: Appl. Phys. 43 105501
[10] Fuerschbach P W, Norris J T, He X, DebRoy T 2003 Understanding Metal Vaporization from Laser Welding (Albuquerque: Sandia National Laboratories) p69
[11] Griem H R 1964 Plasma Spectroscopy (New York: McGraw-Hill) p580
[12] Lacroix D, Jeandel G, Boudot C 1997 J. Appl. Phys. 81 6599
[13] Ribic B, Burgardt P, DebRoy T 2011 J. Appl. Phys. 109 083301
[14] Konjević N, Dimitrijević M S, Wiese W L 1984 J. Phys. Chem. Ref. Data 13 619
[15] Jin X Z 2002 Ph. D. Dissertation (Changsha: Hunan University) (in Chinese) [金湘中 2002 博士学位论文 (长沙: 湖南大学)]
[16] Sibillano T, Rizzi D, Ancona A, Saludes-Rodil S, Nieto J R, Chmelíčková H, Šebestová H 2012 J. Mater. Process. Technol. 212 910
[17] Rizzi D, Sibillano T, Calabrese P P, Ancona A, Lugará P M 2011 Opt. Laser Eng. 49 892
[18] National Institute of Standards and Technology 2013 Atomic Spectra Database Lines Form (Gaithersberg: National Institute of Standards and Technology)
[19] Lu J Y, Wang J, Ma Y G, Chen B 2004 Opt. Precis. Eng. 12 550 (in Chinese) [鲁建业, 王军, 马玉刚, 陈波 2004 光学精密工程 12 550]
[20] Li S X, Bai Z C, Huang Z, Zhang X, Qin S J, Mao W X 2012 Acta Phys. Sin. 61 115201 (in Chinese) [李世雄, 白忠臣, 黄政, 张欣, 秦水介, 毛文雪 2012 61 115201]
[21] Wang Y N, Liu Y, Zheng S, Lin G Q 2012 Chin. Phys. B 21 075202
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[1] Tang X H, Zhu H H, Zhu G F, Li S M 2000 China Mech. Eng. 11 741 (in Chinese) [唐霞辉, 朱海红, 朱国富, 李适民 2000 中国机械工程 11 741]
[2] Su Y D 2000 China Mech. Eng. 11 1389 (in Chinese) [苏彦东 2000 中国机械工程 11 1389]
[3] Zhang Y, Chen G Y, Li L J 2008 Manuf. Technol. Machine Tool 3 98 (in Chinese)[张屹, 陈根余, 李力钧 2008 制造技术与机床 3 98]
[4] Zhao Q, Wu Q B, Wang W 2006 Infrared Laser Eng. 35(S3) 70 (in Chinese) [赵强, 吴清彬, 王伟 2006 红外与激光工程 35(S3) 70]
[5] Zhang Y, Li L J, Zhang G 2005 J. Phys. D: Appl. Phys. 38 703
[6] Greses J, Hilton P A, Barlow C Y, Steen W M 2003 Proceedings International Congress on Applications of Lasers and Electro-Optics (Orlando: Laser Institute of America) p546
[7] Kawahito Y, Matsumoto N, Mizutani M, Katayama S 2008 Sci. Technol. Weld. Joining 13 744
[8] Kulish M, Fertman A, Golubev A, Tauschwitz A, Turtikov V 2011 Rev. Sci. Instrum. 72 2294
[9] Bedenko D V, Kovalev O B, Krivtsun I V 2010 J. Phys. D: Appl. Phys. 43 105501
[10] Fuerschbach P W, Norris J T, He X, DebRoy T 2003 Understanding Metal Vaporization from Laser Welding (Albuquerque: Sandia National Laboratories) p69
[11] Griem H R 1964 Plasma Spectroscopy (New York: McGraw-Hill) p580
[12] Lacroix D, Jeandel G, Boudot C 1997 J. Appl. Phys. 81 6599
[13] Ribic B, Burgardt P, DebRoy T 2011 J. Appl. Phys. 109 083301
[14] Konjević N, Dimitrijević M S, Wiese W L 1984 J. Phys. Chem. Ref. Data 13 619
[15] Jin X Z 2002 Ph. D. Dissertation (Changsha: Hunan University) (in Chinese) [金湘中 2002 博士学位论文 (长沙: 湖南大学)]
[16] Sibillano T, Rizzi D, Ancona A, Saludes-Rodil S, Nieto J R, Chmelíčková H, Šebestová H 2012 J. Mater. Process. Technol. 212 910
[17] Rizzi D, Sibillano T, Calabrese P P, Ancona A, Lugará P M 2011 Opt. Laser Eng. 49 892
[18] National Institute of Standards and Technology 2013 Atomic Spectra Database Lines Form (Gaithersberg: National Institute of Standards and Technology)
[19] Lu J Y, Wang J, Ma Y G, Chen B 2004 Opt. Precis. Eng. 12 550 (in Chinese) [鲁建业, 王军, 马玉刚, 陈波 2004 光学精密工程 12 550]
[20] Li S X, Bai Z C, Huang Z, Zhang X, Qin S J, Mao W X 2012 Acta Phys. Sin. 61 115201 (in Chinese) [李世雄, 白忠臣, 黄政, 张欣, 秦水介, 毛文雪 2012 61 115201]
[21] Wang Y N, Liu Y, Zheng S, Lin G Q 2012 Chin. Phys. B 21 075202
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