The influence of welding parameters in TIG welding of aluminium alloys

Abstract

Tema diplomskog rada je impulsno TIG zavarivanje aluminijske legure. Rad se sastoji od teoretskog i eksperimentalnog dijela. U teoretskom dijelu je prvotno predstavljen aluminij i svojstva koja ga čine značajnim tehničkim materijalom. U nastavku je navedena podjela aluminijskih legura uz pripadajuću analizu i mogućnosti optimiranja mehaničkih svojstava. Drugi dio teoretskog dijela obuhvaća zavarivanje aluminija i legura primjenom TIG zavarivanja uz naglasak na impulsni način. Uz opis procesa zavarivanja, zavarivačke opreme i parametara procesa; navedene su i najčešće greške u zavarenim spojevima kod aluminija i legura. U eksperimentalnom dijelu je provedeno TIG zavarivanje legure EN AW 1050. Ukupno je zavareno šest sučeljenih spojeva, pet klasičnim TIG načinom, jedan impulsnim TIG načinom. Nakon zavarivanja, provedeno je razorno ispitivanje savijanjem na licu i korijenu zavarenih spojeva. Na temelju teoretskih i eksperimentalnih saznanja, donesen je zaključak.This master's paper's primary focus is pulse TIG welding of an aluminium alloy. It consists of a theoretical and experimental part. The first topic in the theoretical part is aluminium and its properties that make it a crucial technical material. In the following, aluminium alloy classification is brought up as well as the possibilities that enhance optimization of mechanical properties. The second part of the theoretical part is based on TIG welding of aluminium and its alloys with regard to pulse TIG. With TIG welding process, equipment and parameter analysis, an additional research about frequent mistakes in aluminum and alloys welds has been conducted. In the experimental part, TIG welding of EN AW 1050 alloy has been carried out. In total, there were six butt welds. Five of them were carried out via conventional TIG and one was with pulse TIG. After welding, destructive testing, i.e., bending test was conducted on the face and root side of the welds. Based on theoretical and experimental insight, a conclusion was drawn