Journal of Light Metal Welding
Online ISSN : 2186-618X
Print ISSN : 0368-5306
ISSN-L : 0368-5306
Volume 48 , Issue 3
JOURNAL OF LIGHT METAL WELDING
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Technical Paper
  • Seiji Sasabe, Tsuyoshi Matsumoto
    2010 Volume 48 Issue 3 Pages 95-103
    Published: March 15, 2010
    Released: April 19, 2013
    JOURNALS FREE ACCESS
    Weldability of A6082 with Nd-YAG laser was investigated to explain the advantages over the conventional MIG process. It is concluded that rapid cooling rate in HAZ contributes to increasing joint strength and improvement durability against liquation cracking in HAZ during Nd-YAG laser welding. This is why rapid cooling rate is enough to prevent crossing the C-curve for precipitation of β´and small volume of weld metal is enough to reduce shrinkage strain during solidification. And the joint strength increased with an increase of manganese content in the base metal, but by contraries the minimum hardness in HAZ where the fracture occuued in the tensile test decreased. This may be attributed to the prevention of intercrystalline embrittlement due to the addition of managanese in case of Al-Mg-Si series alloys with excessive Si content.
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