Abstract: Al-Si alloy is a famous casting material which has excellent characteristics to apply, such as good casting ability, excellent welding ability, and corrosion resistance. This study discusses the percentage of the chemical composition of Al-Si with the addition of Sn. the solubility of Sn is a study to study these effects that affect the mechanical properties of Al-Si players. The results show that with a higher Sn concentration, the mechanical properties of the mixture of Al-Si and Sn will increase and can increase precipitation. the evaluation aims to identify the distribution of chemical composition in materials using SEM-EDS and XRD. in this study a mixture of Al-Si and Sn after casting and the T6 heat treatment process formed precipitation of Mg2Si and Fe3Si, which could enable increased mechanical properties.

Key words: Al-Si, strengthening precipitation, casting, heat treatment.

Cite: Fuad Adnan, Haris Rudianto, Hery Sulistyo, Deny Haryadi, "Effect of T6 Heat Treatment on Mechanical Properties and Microstructures of Cast Al-Si-Sn-Fe-Cu," International Journal of Materials Science and Engineering, Vol. 7, No. 4, pp. 109-124, December 2019. doi: 10.17706/ijmse.2019.7.4.109-124