The Paton Welding Journal, 2006, №07

2006 №07 (06)

2006 №07 (08)

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The Paton Welding Journal, 2006, #7, 34-37 pages

Properties of CO₂-laser welded joints of dissimilar magnesium alloys

W. Kalita¹, P. Kolodziejczak², L. Kwiatkowski³, M. Grobelny³, J. Hoffman¹

¹Institute of Fundamental Technological Research, PAS, Warsaw, Poland
²Warsaw Technical University, Warsaw, Poland
³Tnstitute of Precision Mechanics, Warsaw, Poland

Abstract
This paper provides the results of investigation that has been carried out on the keyhole laser beam welding of dissimilar magnesium alloys. Welding of workpieces of alloys of MgAlZn (brittle) and MgAIMn (ductile) groups has been performed with the CO;-laser of maximum power of 2.5 kW. With the chosen flow rate of helium shielding and the beam focal position set on the metal surface the welds with no defects and with nearly parallel boundaries were obtained. The analysis of microstructures of the joints, measurements of hardness distributions and the elemental distributions in the weld cross-sections allowed finding the changes due to beam action and recrystallization. The static tensile strength tests have permitted to determine the conditions when the joints of satisfactory mechanical properties could be acquired. The corrosion immersion tests are also reported
Keywords: laser welding, COylaser, magnesium alloys, dissimilar joints, microstructure, mechanical properties, corrosion resistance

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Suggested Citation

W. Kalita, P. Kolodziejczak, L. Kwiatkowski, M. Grobelny, J. Hoffman (2006) Properties of CO₂-laser welded joints of dissimilar magnesium alloys. The Paton Welding J., 07, 34-37.

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