20.500.12556/RUL-184005 Heterogenous equilibria in Al-Mn quasicrystalline alloy during high-pressure die casting Heterogena ravnotežja v Al-Mn kvazikristalni zlitini med visokotlačnim litjem Using advanced characterization techniques, including optical microscopy, scanning electron microscopy (SEM) with energy-dispersive spectroscopy (EDS), and differential scanning calorimetry (DSC) combined with Thermo-Calc calculations, the study demonstrated the relationship between casting conditions, microstructure, and phase formation during high-pressure die casting (HPDC) and comparative gravity casting in steel and copper molds. We demonstrated how both casting conditions and changes in the alloy’s chemical composition instigate different heterogeneous equilibria and thus influence the constitution of the alloys. After equilibrium solidification, the microstructures of the synthesized alloys consist of αAl matrix, Al6Mn, and traces of Al2CuMg, Al12Mn, and Mg2Si, while nonequilibrium solidification led to the formation of different phases, such as icosahedral quasicrystalline (IQC) phases, such as icosahedral quasicrystalline (IQC) phases their approximant α-AlMnSi and β-AlMnSi phase. Finally, we confirmed the presence of different heterogeneous equilibria that existed simultaneously during the solidification of the investigated alloys. Z uporabo sodobnih metod karakterizacije, vključno z optično mikroskopijo, vrstično elektronsko mikroskopijo (SEM) inenergijsko disperzijsko spektroskopijo (EDS) ter diferencialno vrstično kalorimetrijo (DSC) v kombinaciji s Thermo-Calc izračuni, je v študiji prikazana povezava med pogoji litja, mikrostrukturo in nastankom faz pri visokotlačnem litju (HPDC) ter primerjalnem gravitacijskem litju v jeklene in bakrene kokile. Pokazano je, da tako pogoji litja kot spremembe kemične sestave zlitine sprožijo različna heterogena ravnotežja in s tem vplivajo na sestavo zlitin. Po ravnotežnem strjevanju so mikrostrukture sintetiziranih zlitin sestavljene iz prevladujoče matrice αAl in Al6Mn ter sledov Al2CuMg, Al12Mn in Mg2Si, medtem ko se med neravnotežnim strjevanjem formirajo nove faze, kot so ikozaedrična kvazikristalna faza (IQC) in njen aproksimant αAlMnSi in faza β-AlMnSi. Potrdili smo prisotnost različnih heterogenih ravnotežij, ki so obstajala hkrati med strjevanjem preiskovanih zlitin. Al-alloys quasicrystals equilibrium HPDC Al-zlitine kvazikristali ravnotežje visokotlačno litje true false true Inštitut za kovinske materiale in tehnologije Angleški jezik Slovenski jezik Delo ni kategorizirano 2026-06-24 06:53:42 2026-07-08 11:17:42 2026-07-09 04:14:10 0000-00-00 00:00:00 2026 0 0 str. 437-444 ǂšt. ǂ3 ǂLetn. ǂ60 maj.-jun. 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2026-06-08 669.018.25:549.2 1580-2949 10.17222/mit.2026.1703 281737219 1703-Article_Text-8226-1-10-20260608_(1).pdf 1703-Article_Text-8226-1-10-20260608_(1).pdf 1 2D6309F9BE43738242BAA82E19A4582A 17c2e8a44bfa74f4e4c4213eb59a09e486700771321a980d95652f67a44881cd 55fbc862-7aae-11f1-9b0d-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=237319 https://doi.org/10.17222/mit.2026.1703 1 985272f8-6f88-11f1-9b0d-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=236443 Naravoslovnotehniška fakulteta 0 0 0