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Investigation of Electron Beam Welding on AZ91D-F Extrusive Plates

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Abstract:

Electron beam welding (EBW) is currently the most advanced jointed technology because of its superior welding precision and larger depth-width ratio than other conjunctive methods. The high vacuum environment of EBW is favorable for the welding of magnesium alloys to prevent the active metals from oxidation. In this study, a home-made 11mm-thick AZ91D extrusive plate was used. By operating and comparing the changeable welding parameters, the optimum condition has been determined as 113mA, 40kV, 73.3mm/s and focal position at bottom. 82% and 89% of the matrix material strength were obtained by stress and non-stress concentration weldments, respectively. Under other worse parameters, the reduction of the strength of EBW for AZ91D-F resulted from four factors, which were undercuts, heat affected zone (HAZ), hot cracking, and cavities.

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Periodical:

Materials Science Forum (Volumes 505-507)

Pages:

193-198

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.505-507.193

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Cite this paper

Online since:

January 2006

Authors:

C.T. Chi, C.G. Chao, C.A. Huang, C.H. Lee

Keywords:

Electron Beam Weld (EBW), Heat Affected Zone (HAZ), Optimum Parameter, Stress Concentration

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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