[Kovove materialy - Metallic materials]
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© Institute of Materials and Machine Mechanics, Slovak Academy of Sciences, Bratislava, Slovak Republic

VOLUME 50 (2012), Issue 4

Effect of casting parameters on the microstructure and mechanical properties of squeeze cast A380 aluminum die cast alloy
LUS, H. M.
vol. 50 (2012), no. 4, pp. 243 - 250
DOI: 10.4149/km_2012_4_243

A380 Al-Si-Cu die casting alloy is the most common of all die casting Al alloys and is used especially in the automotive industry due to the best combination of utility and cost. A high percentage of these components are produced by a high pressure die casting process; however, the quality and performance of these components need to be improved. Therefore, different approaches to component-making have been introduced such as semi-solid forming or squeeze casting over the last four decades. In the present study, direct squeeze casting of A380 alloy as a function of applied pressure was investigated. Applied pressures from 10 MPa to 50 MPa were considered and compared with gravity die cast samples. SDAS values ranging from 5.70 μm to 10 μm have been obtained by squeeze casting whereas 13.70 μm was found in gravity die casting. Density measurements and mechanical tests show us that the porosity level and presence of micro-voids were greatly decreased with increasing pressure while ultimate tensile strength and elongation increased in squeeze cast parts.

Key words
squeeze casting, A380 alloy, Al-Si-Cu alloy, dendrite arm spacing

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Full title of this journal is bilingual: Kovové materiály - Metallic Materials.
The official abbreviation in accordance with JCR ISI is Kovove Mater.

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