Abstract
The paper deals with welding of AZ31 magnesium alloy with disk laser with the output power of 2.0kW. The thickness of the base material was 1.7mm. Overlapped welded joints were produced after mechanical removal of the surface oxide layer in the first stage. Laser welding of as received AZ31 magnesium alloy was carried out in the next part of the research. Light microscopy was used to analyze both the macrostructure and microstructure of welded joints. Chemical composition of the base material and weld metal was examined using energy dispersive x-ray microanalysis (EDX). The mechanical properties of welded joints were studied by microhardness measurements and tensile testing. The influence of the oxide layer on the properties of AZ31 magnesium alloy welded joints was assessed.
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