Journal
MATERIALS LETTERS
Volume 284, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2020.128946
Keywords
Combined hybrid welding; Aluminium alloy; Porosity; Cracking susceptibility; Bendability; Grain boundary wetting
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The study investigated the effects of welding parameters on the quality of laser-arc combined welding of 5754 magnesium aluminium alloy, and identified optimal process conditions to reduce porosity and improve key-hole stability in the welded joint. The phenomenon of grain boundary wetting was observed in the fused zone.
Laser-arc combined welding of 5754 magnesium aluminium alloy was performed with the CO2 heat source and MIG torch. The effects of welding conditions on penetration depth, geometry, porosity and crack susceptibility were investigated. Concerning porosity suppression and key-hole stability, optimal process parameters were identified. The grain boundary wetting phenomenon was observed in the fused zone. (c) 2020 Elsevier B.V. All rights reserved.
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