Eutectic Grains in Unmodified and Strontium-Modified Hypoeutectic Aluminum-Silicon Alloys From: Metallurgical and Materials Transactions | Date: June 1, 2004| Author: Dahle, Arne K; StJohn, David H; Taylor, John A; McDonald, Stuart D | Copyright Minerals, Metals & Materials Society Jun 2004. Provided by ProQuest LLC.Copyright information

Additions of strontium to hypoeutectic aluminum-silicon alloys modify the morphology of the eutectic silicon phase from a coarse platelike structure to a fine fibrous structure. Thermal analysis, interrupted solidification, and microstructural examination of sand castings in this work revealed that, in addition to a change in silicon morphology, modification with strontium also causes an increase in the size of eutectic grains. The eutectic grain size increases because fewer grains nucleate, ...

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