Influence of modification on microstructure degradation of AlSi12 alloy exposed to the corrosion environment

Znanstveni rad - Izvorni znanstveni rad

• Autor: Franjo Kozina
• Autor: Zdenka Zovko Brodarac
• Autorova ustanova: Sveučilište u Zagrebu; Metalurški fakultet; (Zavod za procesnu metalurgiju); (Laboratorij za željezo, čelik i ljevarstvo)
• Znanstveno / umjetničko područje, polje i grana: TEHNIČKE ZNANOSTI; Metalurgija; Procesna metalurgija

Sažetak (engleski)

The corrosion resistance of aluminum-silicon (Al- Si) foundry alloys is a result of microstructure development influenced by melt treatment and solidification. As a part of the main eutectic (αAl + βSi), βSi particles are cathodic with respect to the αAl matrix enabling micro-galvanic couple formation and localized corrosion. Despite its high polarization and low current density, increase in the eutectic (αAl + βSi) will contribute to the microstructure degradation of an alloy in corrosive environment. The research was performed in order to estimate the influence of eutectic βSi particles size on the microstructure degradation of AlSi12 alloy with mixed morphology of eutectic (αAl + βSi). The results of light microscopy indicated preferred initiation and progress of cavities involving modified eutectic (αAl + βSi) with eutectic βSi particles of smaller average particle size. The unmodified eutectic (αAl + βSi) with lamellar morphology and dendrites of primary αAl phase were not visually affected by degradation. The average cavity size and pH value of the solution increase with the increasing exposure time, while microstructure degradation rate decreases.

• Ključne riječi (engleski): AlSi12; eutectic modification; particle size; corrosion environment; microstructure degradation
• Jezik: engleski
• Vrsta publikacije: Znanstveni rad - Izvorni znanstveni rad
• Status objave: Objavljen
• Vrsta recenzije: Recenziran - međunarodna recenzija
• Verzija publikacije: Objavljena verzija rada (izdavačev PDF)
• Naslov zbornika: CONFERENCE PROCEEDINGS - METAL 2020
• Brojčani podaci: str. 994-999
• BPC: https://www.confer.cz/metal/2020 HRK
• ISBN: 978-80-87294-97-0
• p-ISSN: 2694-9296
• URN:NBN: urn:nbn:hr:115:437472
• Datum objave publikacije: 2020-05-20
• Skup: Naziv: 29th International Conference on Metallurgy and Materials; Kratica: METAL2022; Lokacija: Brno, Češka; Organizator: VSB - Technical University of Ostrava Engineering Academy of Czech Republic; Datum početka: 2020-05-20; Datum završetka: 2020-05-22; Vrsta izlaganja: Predavanje
• Vrsta resursa: Tekst
• Izdavač: Technical University of Ostrava
• Mjesto izdavanja: Brno
• Prava pristupa: Otvoreni pristup
• Datum i vrijeme pohrane: 2022-09-30 07:30:52