Heterogenous equilibria in Al-Mn quasicrystalline alloy during high-pressure die castingDremelj, Borut (Avtor) Zaky, Adam (Avtor) Naglič, Iztok (Avtor) Zupančič, Matej (Avtor) Markoli, Boštjan (Avtor) Al-alloysquasicrystalsequilibriumHPDCUsing 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.Inštitut za kovinske materiale in tehnologije20262026-06-24 06:53:42Delo ni kategorizirano184005UDK: 669.018.25:549.2ISSN pri članku: 1580-2949DOI: 10.17222/mit.2026.1703COBISS_ID: 281737219sl