Tag Archives | Phase Diagram of Alloy Systems

In this article we will discuss about the phase diagrams that show solid-state phase transformations by using eutectoid and peritectoid reaction. 1. Eutectoid Reaction: Eutectoid reaction is best known for its occurrence in iron-carbon alloys, where it occurs because of the polymorphic transformation in iron, and is mainly responsible for the various types of heat treatments in steels. This reaction [...]

Al-Si diagram is a eutectic diagram where solid solubility at least of aluminium in silicon is negligible, and maximum solubility of silicon in aluminium (at eutectic temperature) is 1.65%. The eutectic composition is 12.7% silicon. Fig. 3.18 illustrates this diagram and photomicrographs of alloys at room temperature. Alloys of Al-Si are very important casting alloys mainly because of high fluidity [...]