Morphological Change and Its Mechanism of Eutectic Silicon for Strontium-Modified Alloy A357

摘要

The microstructure evolution for alloy A357 modified by original Al-10Sr alloy was systematically investigated. The results show that the eutectic silicon phase becomes finer and more homogeneous with the increase of strontium concentration and modifying temperature. The mechanism of microstructure evolution was also investigated by TEM observation.