Experimental investigation on metallurgical mechanical tribological and corrosion behavior of tig welded AA5083 H111 and AA6061 T6 with modified filler rod

Abstract

The AA5083-H111 (Al/Mg) and AA6061-T6 (Al/Mg/Si) materials are newlinehighly employed for fabricating the components for marine application due to newlinetheir higher corrosion resistance and higher tensile strength. Hence, AA5083 - newlineH111 and AA6061-T6 materials were chosen as materials for this research. newlineThe better performance materials are welded together by utilizing the TIG and newlineMIG welding. The TIG welded joint is better than MIG welded joint because newlineof TIG welding can produce high quality welds with lesser density. So TIG newlinewelding process was chosen for welding of dissimilar AA6061-T6 and newlineAA5083-H111 material in this research. The filler rods used while using TIG newlinewelding of aluminum alloys influences the attained mechanical, Tribological newlineand corrosion properties. Filler rod ER5356 was utilized as filler rod for newlinewelding of dissimilar AA5083-H111 and AA6061-T6 material. Further newlineenhance the attained properties of dissimilar joints modified filler rods were newlineused and 0.25 wt.% and 0.5 wt % scandium added ER5356 filler rod was used newlinein this investigation to improve the weld quality of AA5083-H111 and newlineAA6061-T6. The input parameters for TIG welding such as voltage 20 to 26 newlineV instep of 3 V, current 160 to 210 A in step of 25 A and gas flow rate 16 to newline24 l/min in step of 4 l/min were chosen as input parameters for optimizing the newlineTIG welding parameter of dissimilar Al/Mg along with Al/Mg/Si. The micro newlinehardness, percentage of elongation and tensile strength were the selected newlineresponse parameters. The L9 Orthogonal Array (OA) was employed for newlineoptimizing TIG welding process parameters by using ER5356, ER5356/0.25 newlineSc and ER5356/0.5 Sc filler rods. The optimization was done by employing newlineTaguchi and ADAM gene algorithm. newline