Alteration of Solution Treatment Condition to the Precipitation Behavior A319 Alloy

Abstract

The development of precipitate during ageing treatment of A319 alloy contributed significantly to the alloy strengthening mechanism. Two solution treatment temperatures which were set at 510°C and 525°C were subjected onto the different groups of A319 alloy samples and followed by artificial ageing process at 180°C. Scanning electron microscopy was employed to observe the over-aged samples from both solution treatment temperatures. The observation shows that Mg2Si precipitates was only appeared at the higher solution treatment condition, while the Al2Cu precipitate developed in both solution treatment temperatures.

Effect of Solution Treatment Temperature on Tensile Strength of Al-Mg-Si Alloy

“…The optimal solution treatment (545°C/4 hours) for the secondary (recycled) eutectic AlSi12Cu1Fe cast alloy improved mechanical properties, however solution treatment at 565 °C caused testing samples distortion, local melting process and is not applicable for this secondary alloy. According to the reference [9], different precipitates development has occurred during ageing treatment of A319 alloy. Two solution treatment temperatures of 510°C and 525°C were selected before artificial ageing at 180°C.…”