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Homogenisation efficiency assessed with microstructure analysis and hardness measurements in the EN AW 2011 aluminium alloy
ID Vončina, Maja (Avtor), ID Nagode, Aleš (Avtor), ID Medved, Jožef (Avtor), ID Paulin, Irena (Avtor), ID Žužek, Borut (Avtor), ID Balaško, Tilen (Avtor)

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Izvleček
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.

Jezik:Angleški jezik
Ključne besede:EN AW 2011 aluminium alloy, thermodynamic equilibrium, intermetallic phases, eutectic, homogenisation, hardness
Vrsta gradiva:Članek v reviji (dk_c)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:NTF - Naravoslovnotehniška fakulteta
Leto izida:2021
Status objave pri reviji:Objavljeno
Verzija članka:Založnikova različica članka
Št. strani:11 str.
Številčenje:Vol. 11, iss. 8, art. 1211
PID:20.500.12556/RUL-135969 Povezava se odpre v novem oknu
UDK:669
ISSN pri članku:2075-4701
DOI:10.3390/met11081211 Povezava se odpre v novem oknu
COBISS.SI-ID:72040195 Povezava se odpre v novem oknu
Datum objave v RUL:05.04.2022
Število ogledov:132
Število prenosov:54
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Gradivo je del revije

Naslov:Metals
Skrajšan naslov:Metals
Založnik:MDPI
ISSN:2075-4701
COBISS.SI-ID:15976214 Povezava se odpre v novem oknu

Licence

Licenca:CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
Začetek licenciranja:01.08.2021

Projekti

Financer:Drugi - Drug financer ali več financerjev
Program financ.:Republic of Slovenia, Ministry of Education, Science and Sport
Številka projekta:OP20.03531
Naslov:Modelling of Thermomechanical Processing of the Aluminium Alloys for High Quality Products
Akronim:MARTIN

Financer:EC - European Commission
Program financ.:European Regional Development Fund
Naslov:Modelling of Thermomechanical Processing of the Aluminium Alloys for High Quality Products
Akronim:MARTIN

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:P2-0344
Naslov:Napredna metalurgija

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