Abstract

The hot tearing susceptibilities of an Al–Si based alloy were investigated for hot tearing characteristics. The experimental studies were conducted using a newly developed enhanced constrained rod casting method that enables real-time measurements of the contraction load developed in the casting and the temperature variations during solidification as a function of time. A304 and A380 casting alloys were selected to study hot tearing characteristics at pouring temperatures of 700 °C, 750 °C, and 800 °C. The study showed that hot tearing was not observed in measurement rod of A304 and A380 casting alloys. However, hot tearing was observed in the constrained rods A and B of A380 casting alloy at 750 °C. A304 alloy showed higher resistance to hot tearing at a casting temperature below 750 °C.

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