20.500.12556/RUL-135327 Mechanism of the Mg$_3$Bi$_2$ phase formation in Pb-free aluminum 6xxx alloy with bismuth addition In the present work, free-cutting aluminum alloy AA6026 with 1.1 wt.% bismuth addition was fabricated by different melt preparation methods in order to investigate whether the melt preparation route affects the solidification sequence and thus has an influence on the machinability of the alloy. All experiments were designed to simulate variable industrial conditions: addition of bismuth in an induction melting furnace, addition of bismuth in an electric resistance holding furnace, addition of bismuth together with grain refiner, effect of holding time and melt temperature before casting. Detailed thermodynamic analyses (DSC, Thermo-Calc) and microstructural characterization (SEM-EDS, XRD) have been performed to explain the solidification sequence, microstructure development and especially formation of the intermetallic Mg$_3$Bi$_2$ phase. free-machining AA6xxx alloy bismuth Mg$_3$Bi$_2$ phase solidifcation model true false true Angleški jezik Ni določen Članek v reviji 2022-03-08 09:18:28 2022-03-08 09:18:29 2022-09-14 04:12:48 0000-00-00 00:00:00 2021 0 0 12 str. iss. 4, art. 424 Vol. 11 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 669 2073-4352 10.3390/cryst11040424 66695939 RAZ_Recnik_Simon_2021.pdf RAZ_Recnik_Simon_2021.pdf 1 1CCACB95E1A897104763508E292C8587 568ba2d65eae0a268ede2fa9a9ba37bffe68583e6bb921ed7161ff265209eca4 4d8246ec-9eb8-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=154337 https://www.mdpi.com/2073-4352/11/4/424 0 287c0006-9eb8-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=154336 Naravoslovnotehniška fakulteta 0 0 0