Abstract
Abstract 5xxx series aluminum alloys find increasing applications in the marine fabrication industries due to its unique mechanical and corrosion properties. The present attempt focuses the effect of metallurgical changes in mechanical behavior and corrosion resistance of Aluminium alloy 5083-H111 and its weldment. Gas tungsten arc welding (GTAW) process was used to fabricate the weld coupons using the filler metal ER 5183. Microstructure analysis was carried out in the fusion zone and compared to the heat affected zone and parent metal region. The mechanical behavior of the weld was compared with its parent metal by performing microhardness, impact toughness, tensile behavior and formability test. Electrochemical corrosion test revealed better corrosion resistance for parent metal sample than the weldment. The existence of Mg3Al2 precipitates in the weldment led to the reduction in corrosion resistance
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