Influence of remelting on mechanical properties of AlSi9Cu3(Fe) alloy

Scientific paper - Preliminary note / Short communication

• Author: Zdenka Zovko Brodarac
• Author: Davor Stanić
• Author: Martin Folta
• Author: Franjo Kozina
• Editor: Eun Soo Park
• Author's institution: University of Zagreb; Faculty of Metallurgy; (Department of Process Metallurgy); (Laboratory of Iron, Steel and Founding)
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Metallurgy; Process Metallurgy

Abstract (english)

Conventional AlSi9Cu3(Fe) (EN AC 46000) alloy is the most common Al-alloy used in the automotive industry. Also, the high-pressure die-casting (HPDC) represents the most common process for this type of complex geometry and high performance castings due to economy and shortening of process cycle. The AlSi9Cu3(Fe) alloy enables achievement of relatively high mechanical properties, strength and hardness, excellent fluidity and resistance to hot cracking, although it shows slightly lower elongation and corrosion resistance. Usage of secondary charge material influences is cost-effective due to saving of raw materials and energy and reduction of pollution. The mechanical properties of aluminium cast alloys are strongly dependent from the microstructure which develops on the base of chemical composition, melt treatment, solidification rate, casting process and from potential heat treatment. This paper investigates the influence of remelted AlSi9Cu3(Fe) alloy on the mechanical properties in as-cast state, and after 4 and 80 weeks of natural aging. The metallographic analysis showed that the microstructure of such alloy does not deviate significantly from usual practice obtained by using 50 % or 100 % of returnable material. Mechanical properties investigation indicates degradation of the yield strength in as-cast state and after 4 weeks of natural aging, despite the same microstructure constituents. After 80 weeks, the effect of natural ageing led to the increase in yield strength and achievement of satisfactory mechanical properties.

• Keywords (english): AlSi9Cu3(Fe) alloy, natural ageing, microstructure, mechanical properties
• Language: english
• Publication type: Scientific paper - Preliminary note / Short communication
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Publication title: 74th_WFC_E-Abstract_Book
• Edition: The World Foundry Organization, Korea Foundry Society
• Numbering: pp. 1-2, 1-0437
• URN:NBN: urn:nbn:hr:115:003574
• Publication: 2022
• Project: Number: KK.01.1.1.02.0020; Title (croatian): Centar za ljevarstvo - SIMET; Title (english): Center for casting - SIMET; Acronym: SIMET; Leader: Zdenka Zovko Brodarac; Jurisdiction: Croatia; Funding stream: European Regional Development Fund
• Project: Number: KK.01.1.1.02.0022; Title (croatian): Virtulab – Integrirani laboratorij za primarne i sekundarne sirovine; Acronym: Virtulab; Leader: Sibila Borojević Šoštarić; Zdenka Zovko Brodarac (MF); Jurisdiction: Croatia; Funding stream: European Regional Development Fund
• Conference: Title: 74th World Foundry Congress: Cast the future; Acronym: WFC; Location: Busan, Republic of Korea; Organizer: The World Foundry Organization, Korea Foundry Society; Start date: 2022-10-16; End date: 2022-10-20; Assembly type: Invited lecture
• Type of resource: Text
• Publisher: The World Foundry Organization, Korea Foundry Society
• Publishing place: Busan, Južna Korea
• Access conditions: Closed access
• Created on: 2024-05-06 10:13:32