Effect of solution treatment on intermetallic phases morphology in AlSi₉Cu₃ cast alloy

Abstract

In the present work was investigated the influence of solution treatment by 505°C, 515°C and 525°C±2°C with different holding times 2, 4, 8, 16 and 32 hours on microstructural elements of commercial AlSi9Cu3 cast alloy. During this heat treatment was observed the spheroidization of eutectic Si, gradual disintegration of iron rich intermetallic phases on base Al(FeMnMg)Si, shortening and thinning of Al5FeSi iron needles and the dissolving of Al-Al2Cu-Si intermetallic phase by temperature 525°C.

Keywords

• Al-Si cast alloys
• eutectic Si
• solution treatment
• intermetallic phases