1513 KB22 KB199920252014Barlas, ZaferÇolak, Muratštevilka:12letnik:60str. 832-837, SI 151ISSN:0039-2480COBISSID:13819931URN:URN:NBN:SI:doc-4JBS2X4XenZveza strojnih inženirjev in tehnikov Slovenije et al.Strojniški vestnikfaza povečanja osnega pritiskamikrostrukturenatezna trdnosttemperatura zvaraulitki iz zlitine Al-Cuvarjenje s trenjemEvaluation of the influence of upset stage on joint properties of friction welded dissimilar aluminum-copper cast alloys|Friction welding was applied to dissimilar aluminum cast bars alloyed with 2 and 8% copper and the effects of upset time on joint properties were evaluated in this study. The welding process was carried out by a vertical milling machine. Tensile test results show that the ultimate tensile strength increased with an increase in upset time and it reached 88% for Al-2%Cu and 74% for Al-8%Cu base metals. The heat affected zone, thermo-mechanical affected zone, and weld metal were detected in this joint by optical examination, in addition to the base metals. A peak temperature of 436 °C was measured in the weld zone. Hardness values also varied according to microstructural changes. The highest hardness values were detected in the weld metal and its average hardness was 217 BrinellKonvencionalne tehnologije varjenja zaradi napetostnega korozijskega pokanja in toplega pokanja v splošnem niso primerne za varjenje ulitkov iz zlitin aluminija in bakra (Al-Cu, serija 2XX.X). Zato obstaja potreba po eksperimentalnih študijah varjenja teh zlitin. Članek obravnava varivost ulitih palic iz različnih aluminijevih zlitin % z 2 % bakra (Al-2%Cu) in z 8 % bakra (Al-8%Cu) % po postopku varjenja s trenjem. Podana je analiza mehanskih, makrostrukturnih in mikrostrukturnih lastnosti testnih zvarovTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Ljubljani, Fakulteta za strojništvo