Establishment of empirical relations amidst mechanical attributes of friction stir welded mg alloys and optimization of process parameters

Abstract

Owing to superior strength-to-mass ratio, easy degree of castability, newlinelower density, excellent damping relevant capacity and larger specific newlinestiffness, alloys of magnesium (Mg) were found to be potential candidates for newlinereplacing alloys of steel and aluminium, in the aeronautical and automobile newlinerelevant sectors. Even though alloys of Mg are widely preferred for newlineautomotive and aerospace sectors, joining of alloys of Mg employing newlinetraditional fusion based techniques is a quite complex task, owing to the very newlinesevere affinity of Mg alloys for oxygen and other chemical based oxidants. newlineIn addition to this, Mg alloys will get readily oxidized in the joint portions newlineduring fusion based joining methodologies, owing to their superior-chemical newlinereactivity at larger temperatures. So, there prevails a vital need for identifying newlinea reliable welding technique to join the alloys of Mg for enhancing its degree newlineof usage in automotive and aerospace sectors. newlineFriction stir welding (i.e., FSW) belonging to the category of solid newlinestate joining techniques was proven to eliminate flaws and problems relevant newlineto solidification, as during this FSW process, the bulk melting of materials is newlineavoided. In addition to this, FSW process does not generate flaws like newlinesegregation of materials, porosity, hot cracks etc., as the metal, being welded newlinedoes not melt during the FSW process. As the melting of parent metal does newlinenot occur during this process, FSW process possesses various merits over newlinefusion joining techniques. newline