Paper Title:
CW CO2 Laser Welding of Al-Mg Alloys with Filler Wires
  Abstract

The CW CO2 laser weldability of various Al-Mg alloys was investigated in terms of weld strength, ductility, Vickers hardness, formability and solidification cracking tendency when both autogenous and wire feed welding were made. Tensile strength of the laser welds was lower than that of the corresponding base metals, and it was linearly proportional to the Mg content of the weld metal. Formability and ductility of Al-Mg alloy laser welds were lower than those of corresponding base alloys as well. As for the weld solidification structure, as the Mg content increased in the weld metal, more equiaxed grains developed. Hence, softening of weld metal and solidification cracking were decreased in the weld metal containing higher Mg. Solidification cracking of Al-Mg alloy laser welds showed the highest susceptibility at 1.6 to 1.9wt.% Mg, and it decreased with further increase of Mg content.

  Info
Periodical
Materials Science Forum (Volumes 580-582)
Edited by
Changhee Lee, Jong-Bong Lee, Dong-Hwan Park and Suck-Joo Na
Pages
539-542
DOI
10.4028/www.scientific.net/MSF.580-582.539
Citation
J. W. Yoon, E.R. Wallach, "CW CO2 Laser Welding of Al-Mg Alloys with Filler Wires", Materials Science Forum, Vols. 580-582, pp. 539-542, 2008
Online since
June 2008
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Price
$32.00
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