Maja Vončina (Avtor), Aleš Nagode (Avtor), Jože Medved (Avtor), Irena Paulin (Avtor), Borut Žužek (Avtor), Tilen Balaško (Avtor)

Povzetek

When extruding the casted rods from EN AW 2011 aluminium alloys, not only their homogenized structure, but also their extrudable properties were significantly influenced by the hardness of the alloy. In this study, the object of investigations was the EN AW 2011 aluminium alloy, and the effect of homogenisation time on hardness was investigated. First, homogenisation was carried out at 520 °C for different times, imitating industrial conditions. After homogenisation, the samples were analysed by hardness measurements and further characterised by microscopy and image analysis to verify the influence of homogenisation on the resulting microstructural constituents. In addition, non-equilibrium solidification was simulated using the program Thermo-Calc and phase formation during solidification was investigated. The homogenisation process enabled more rounded shape of the Al$_2$Cu eutectic phase, equilibrium formation of the phases, and the precipitation in the matrix, leading to a significant increase in the hardness of the EN AW 2011 aluminium alloy. The experimental data revealed a suitable homogenisation time of 4–6 h at a temperature of 520 °C, enabling optimal extrusion properties.

Ključne besede

EN AW 2011 aluminium alloy;thermodynamic equilibrium;intermetallic phases;eutectic;homogenisation;hardness;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL NTF - Naravoslovnotehniška fakulteta
UDK: 669
COBISS: 72040195 Povezava se bo odprla v novem oknu
ISSN: 2075-4701
Št. ogledov: 124
Št. prenosov: 49
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Vrsta dela (COBISS): Članek v reviji
Strani: str. 1-11
Letnik: ǂVol. ǂ11
Zvezek: ǂiss. ǂ8
Čas izdaje: 2021
DOI: 10.3390/met11081211
ID: 14947330