Application of aluminium alloys in shipbuilding

U teorijskom dijelu rada opisana je proizvodnja, karakteristike i problematika zavarljivosti aluminijskih legura s posebnim osvrtom na primjenu aluminijskih legura u brodogradnji. Detaljno je opisan MIG postupak zavarivanja, a ukratko su objašnjeni ostali postupci zavarivanja aluminijskih legura, poput TIG-a, elektrolučnog plazma postupka, laserskog i zavarivanja trenjem. U posljednjem dijelu teorijskog rada dan je pregled pripreme spojeva za zavarivanje aluminijskih legura prema normi HRN EN ISO 9692-3. U eksperimentalnom dijelu rada odabrana je tehnologija zavarivanja aluminijske legure 6082. Strojnom obradom sukladno normi HRN EN ISO 9692-3 pripremljene su dvije ploče. Provedeno je sučeono zavarivanje radnih komanda impulsnim MIG postupkom. Naposlijetku su provedena nerazorna ispitivanja penetrantima i ispitivanje savijanjem te je izvršena makroskopska i mikroskopska analiza. Na temelju dobivenih rezultata eksperimentalnog rada donesen je zaključak.The theoretical part of this thesis describes the production, characteristics and weldability problems of aluminum alloys with special emphasis on the application of aluminum alloys in shipbuilding. The thesis also contains a detail description of MIG welding process, and a brief explanation of other welding processes used for aluminum alloys, such as TIG, the arc plasma welding, laser and friction stir welding. The final section gives an overview of recommended types of joint preparation for welding of aluminum alloys according to HRN EN ISO 9692-3. In the experimental part the suitable welding technology has been chosen for welding aluminum alloy 6082. In accordance with the HRN EN ISO 9692-3 standard two plates were machined. Butt welding was done using MIG pulse technology. Welds were tested using non-destructive dye penetrant method and bend test, furthermore the macroscopic and microscopic analysis was also done. Based on the results of experimental work the conclusion was made