The impact of small Zr addition to Al–Ni cast alloy for elevated temperature applications

Šmalc, Jan (author), Zaky, Adam (author), Markoli, Boštjan (author), Šturm, Roman (author)

Most aluminium casting alloys are based on the eutectic system Al–Si, which has weak thermal properties. Alloys from the eutectic Al–Ni system on the other hand have higher thermal stability and good casting properties and are therefore promising for casting applications. Using casting simulations, a copper mold was designed to achieve cooling rates above 100 K/s with the aim of producing a Zr-rich supersaturated solid solution. Microstructural analysis revealed that the addition of Zr leads to notable changes in the microstructure characterised by the formation of primary Al3Zr and αAl dendrites. Subsequent heat treatment revealed that Zr-enriched alloys undergo significant age hardening, which showed an improvement in microhardness due to effective Al3Zr precipitation.

• Language: English
• Keywords: aluminium alloys, ulivanje, evtektik aluminij-nikelj, cirkonij, mikrotrdota
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering; NTF - Faculty of Natural Sciences and Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2024
• Number of pages: Str. 1928-1936
• Numbering: Vol. 32
• PID: 20.500.12556/RUL-160372
• UDC: 620.1
• ISSN on article: 2238-7854
• DOI: 10.1016/j.jmrt.2024.08.029
• COBISS.SI-ID: 205386755
• Publication date in RUL: 27.08.2024

Record is a part of a journal

• Title: Journal of Materials Research and Technology
• Shortened title: J. Mater. Res. Technol.
• Publisher: Elsevier
• ISSN: 2238-7854
• COBISS.SI-ID: 519699737

Licences

• License: CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
• Link: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Description: The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.

Secondary language

• Language: Slovenian
• Keywords: aluminijeve zlitine, casting, aluminium-nickel eutectic, zirconium, microhardness

Projects

• Funder: ARIS - Slovenian Research and Innovation Agency
• Project number: P2-0270
• Name: Proizvodni sistemi, laserske tehnologije in spajanje materialov