Influence of current type and metal transfer on heat affect zone during MIG welding of aluminium alloy

Istraživanje utjecaja vrste struje i prijenosa metala na zonu utjecaja topline tijekom procesa MIG zavarivanja aluminijske legure EN AW-5083-H321 definira kako različiti parametri zavarivanja utječu na karakteristike zone utjecaja topline. Ovo istraživanje ima za cilj bolje razumjeti kako odabir vrste struje te brzina prijenosa metala utječu na mikrostrukturna svojstva i čvrstoću zavarenog spoja od aluminijske legure. Razumijevanje ovih faktora pomaže optimizirati proces MIG zavarivanja i osigurati kvalitetno i pouzdano zavarivanje. Glavni zadatak eksperimentalnog rada je pronaći optimalnu metodu zavarivanja kutnog spoja različitih debljina od aluminijske legure EN AW-5083-H321 postupcima DC MIG-P i AC MIG-P. Potrebno je prethodno odrediti i optimalnu debljinu kutnog zavara. Prije zavarivanja je potrebno prilagoditi odgovarajuće parametre i vrstu žice za zavarivanje uz primjenu mehaniziranog gibanja u zaštitnoj atmosferi plina argona.Investigation of the influence of current type and metal transfer on the heat affected zone during the MIG welding process of aluminum alloy EN AW 5083-H321 defines how different welding parameters affect the characteristics of the heat affected zone. This research aims to better understand how the choice of current type and metal transfer rate affect the microstructural properties and strength of an aluminum alloy welded joint. Understanding these factors helps optimize the MIG welding process and ensure quality and reliable welding. The main task of the experimental work is to find the optimal method of welding angle joints of different thicknesses from aluminum alloy EN AW-5083-H321 using DC MIG-P and AC MIG-P procedures. It is necessary to determine the optimal thickness of the fillet weld beforehand. Before welding, it is necessary to adjust the appropriate parameters and type of welding wire with the application of mechanized motion in a protective atmosphere of argon gas