Authors: Jair Carlos Dutra Régis Henrique Gonçalves e Silva Bruna Martinello Savi Cleber Marques Orestes Estevam Alarcon
Publish Date: 2015/07/01
Volume: 59, Issue: 6, Pages: 797-807
Abstract
Aluminummagnesium alloys have great prominence in the naval sector as they represented structural materials with low specific weight and excellent corrosion resistance in marine environments Such benefits are also seen in other maritime structures as oil platforms Welding is the main manufacturing process in this sector However there are substantial technological challenges when welding these alloys The work undertaken in this paper aimed at the development of welding science and technology in the specific framework of the construction project of an oceanographic sailboat of naval aluminum alloy 5083 This paper presents a technical and scientific contribution for the shortcircuiting gas metal arc welding GMAW process version designated as cold metal transfer CMT As to the CMT mode work intended to verify the compatibility of existing synergic programs in the welding equipment with the investigated wireelectrodes 5183 and 5087 and perform needed adaptations as there are no programs designed specifically for these materials The focus was on obtaining root and fill pass on 60mmthick plates The work also examined the influence of this process on metallurgical effects for the distinct wires and compared the properties between them Welding procedure development and mechanical performance tests destructive and nondestructive were conducted The results show excellent performance of welded joints with both wires and a slightly higher mechanical performance with 5087 wireelectrode
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