Investigation on Pore Formation during Hybrid Laser-Tungsten Inert Gas Arc Welding of Magnesium Alloy AZ31B

Abstract:

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This study seeks to analyze the presence method and quantity of pore during hybrid laser-tungsten inert gas arc (TIG) Welding of Magnesium Alloy AZ31B by radiography, optical microscopy and electron probe microanalysis (EMPA). At the same time, it identifies both the mechanism of pore formation and a remedy for this problem. The experimental results indicate that lacking of shielding gas for laser beam is the dominant cause of macro-porosity formation during the hybrid of laser-TIG welding of magnesium Alloys AZ31B plate, and hydrogen is not main cause to form large pores. A favorable weld without porosity can be obtained by appending lateral shielding gas for laser beam.

Info:

Periodical:

Materials Science Forum (Volumes 488-489)

Edited by:

W.Ke, E.H.Han, Y.F.Han, K.Kainer and A.A.Luo

Pages:

361-364

Citation:

L. M. Liu et al., "Investigation on Pore Formation during Hybrid Laser-Tungsten Inert Gas Arc Welding of Magnesium Alloy AZ31B", Materials Science Forum, Vols. 488-489, pp. 361-364, 2005

Online since:

July 2005

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$38.00

[1] B.A. Mikucki, and J.D. Shearouse. J. D: Ⅲ. 1993. Proceedings of Magnesium Properties and Applications for Automobiles Conference, Detroit, Mich., Society of Automotive Engineers, Inc., pp.107-115.

[2] H. ZHAO and T. DEBROY: Pore Formation during Laser Beam Welding of Die-Cast Magnesium Alloy AM60B-Mechanism and Remedy. Welding Research Supplement, 2001(8), pp.204-210.

[3] Kim, J. S., Watanabe, T., and Yoshida, Y: 1995. Journal of Laser Applications 7(1): 38-46.

[4] A. Haboudou, P. Peyre, A.B. Vannes, G. Peix: Reduction of porosity content generated during Nd: YAG laser welding of A356 and AA5083 aluminium alloys. Materials Science and Engineering A363, (2003) pp.40-52.

DOI: https://doi.org/10.1016/s0921-5093(03)00637-3

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