Influence of cooling rate on microstructure development of AlSi9MgMn alloy

Znanstveni rad - Izvorni znanstveni rad

• Autor: Davor Stanić
• 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

Sažetak (engleski)

Aluminum alloys are widely applied in automotive, aircraft, food, and building industries. Multicomponent technical
AlSi9MgMn alloy is primarily intended for high cooling rate technology. Controlled addition of alloying elements such as
iron and manganese as well as magnesium can improve mechanical and technological properties of the final casting
depending on the cooling conditions during solidification.
The aim of this investigation is the characterization of AlSi9MgMn alloy microstructure and mechanical properties at lower
cooling rates than those for which this alloy was primarily developed. Thermodynamic calculation and thermal analyses
revealed solidification sequence in correlation to the microstructure investigation as follows: development of primary
dendrite network, precipitation of high temperature Al15(Mn,Fe)3Si2 and Al5FeSi phases, main eutectic reaction,
precipitation of intermetallic Al8Mg3FeSi6 phase, and Mg2Si as a final solidifying phase. Influence of microstructure features
investigation and cooling rate reveals significant Al15(Mn,Fe)3Si2 morphology change from Chinese script morphology at
low, irregular broken Chinese script morphology at medium, and globular morphology at high cooling rate. High
manganese content in AlSi9MgMn alloy together with high cooling rate enables the increase of Fe+Mn total amount in the
intermetallic Al15(Mn,Fe)3Si2 phase and encourage favourable morphology development, all resulting in enhanced
mechanical properties in as-cast state.

• Ključne riječi (engleski): AlSi9MgMn alloy; Thermal analysis; Cooling rate; Solidification sequence; Microstructure development; Mechanical properties
• 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 časopisa: Journal of Mining and Metallurgy, Section B, Metallurgy
• Brojčani podaci: vol. 56, br. 3, str. 405-413
• p-ISSN: 1450-5339
• e-ISSN: 2217-7175
• URN:NBN: urn:nbn:hr:115:995703
• Datum objave publikacije: 2020
• URL dokumenta: chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://jmmab.com/wp-content/uploads/2020/12/1450-53392000036S-cf2.pdf
• Vrsta resursa: Tekst
• Prava pristupa: Otvoreni pristup
• Datum i vrijeme pohrane: 2024-04-26 11:42:25