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Solidification process of A357 alloy with Sr addition was investigated in this paper.In particular,the effects of strontium and cooling rate on α-Al dendrite and Al-Si eutectic characteristic temperature were characterized by differential thermal analysis(DTA).Sr addition not only modifies the Al-Si eutectic,but also affects the morphology and structure of primary α-Al dendrite.Sr decreases the growth temperature of α-Al dendrite and Al-Si eutectic,and it also affects the dendrite growth mechanism.It has been found that such effect becomes more significant with higher cooling rate.
Solidification process of A357 alloy with Sr addition was investigated in this paper. In particular, the effects of strontium and cooling rate on α-Al dendrite and Al-Si eutectic characteristic temperature were characterized by differential thermal analysis (DTA) .Sr addition not only modifies the Al-Si eutectic, but also the morphology and structure of primary α-Al dendrite. R decreases the growth temperature of α-Al dendrite and Al-Si eutectic, and it also affects the dendrite growth mechanism. It has been found that such effect becomes more significant with higher cooling rate