Welding of aluminium alloys in shipbuilding industry

Tema ovog diplomskog rada je „Zavarivanje aluminijevih legura u brodogradnji“. Rad se sastoji od teorijskog i eksperimentalnog dijela. U teorijskom dijelu je navedena podjela na gnječene i lijevane aluminijeve legure te njihovo označavanje, upotreba u brodogradnji i problematika zavarivanja. Nadalje, ukratko su opisani postupci kojima se najčešće zavaruju aluminijeve legure u brodogradnji, TIG i MIG. Također, opisana je problematika zavarivanja raznorodnih aluminijevih legura. U eksperimentalnom dijelu je provedeno zavarivanje tri sučeljena spoja aluminijeve legure EN AW 5754. Za zavarivanje limova korišten je automatizirani TIG postupak zavarivanja. Zatim je provedeno ispitivanje savijanjem lica i korijena zavara i mikroskopska analiza uzorka u svrhu uvida strukture i svojstava zavarenih spojeva. U konačnici, temeljem dobivenih rezultata doneseni su zaključci.The topic of this graduate thesis is "Welding of aluminium alloys in shipbuilding industry". The paper consists of a theoretical and an experimental part. The theoretical part presents the classification into wrought and casting aluminium alloys and their designation, usage in shipbuilding and problems associated with the welding of aluminium and its alloys. Furthermore, the most commonly used welding procedures for aluminium alloys in shipbuilding, TIG and MIG are briefly described. Also, it is described the problematic of welding of dissimilar aluminium alloys. In the experimental part, it was performed welding of three butt joints of aluminium alloy EN AW 5754. For welding sheet metal it was used an automated TIG welding process. Welds were tested using face and root bend test and microscopic analysis in order to see the structure and properties of the welded joints. Ultimately, the conclusions were drawn based on the obtained results