Microstructure and Mechanical Properties of LM25 Alloy with Chromium Metallic Composite

Abstract

LM25 have high strength in cast alloys, which can be increased by precipitation hardening heat treatment. LM25 alloy used in this study is hypoeutectic Aluminium. Most encouraging ways to increase the Aluminum compounds mechanical properties can be expansion of components either with low solvency or absolutely insolubility. Among the scope of potential components, Chromium expansion impacts the properties of Aluminum and Aluminum compounds.The increase in hardness of Cr added LM25 alloys is attributed to grain refining and   change in the morphology of dendritic Si in to nodular form. the increase in hardness can be revealed that the precipitated particles (Mg₂Si in LM25 and Mg₂Si) grows  to critical size by maintaining the coherency with the matrix leads to increase of the hardness to peak value.