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        Strontium in Al–Si–Mg Alloy: A Review

        M. R. Sai Ganesh,Nikhil Reghunath,M. J.Levin,Adarsh Prasad,Sanapala Doondi,Karthik V. Shankar 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.1

        The present article reviews the development of cast aluminium alloy with highlights on improvement in the morphological,mechanical, tribological, and ageing properties of Sr modifed Al–Si and Al–Si–Mg alloys. Aluminium and its alloys fndapplication in the automobile and aviation industries. The main objective of utilizing aluminium alloys for structural application, manufacturing of pistons and engine block for automobile industries is its lightweight and low density. However, thelow hardness of these alloys results in a high wear rate. The main factor that afects the properties of aluminium alloys isits microstructure, morphological behaviour, size of the grain and phase distribution. The morphological modifcation forthese alloys is done through diferent processing techniques like casting, heat treatment, solutionising, and alloying elementaddition which augments the mechanical, corrosion, and tribological behaviour of these alloys. Of the alloying elementadditions Sr has proved to a very efective modifer for the alloy, and hence the method of modifcation was studied in detail. The unwanted efects especially porosity, being one of the main factors for failure of components, were investigated andmethods to reduce it according to many researchers were included. Reinforcing the aluminium matrix with ceramic particlesand surface modifcation also enhances the properties of aluminium alloys. The current article reviews the recent techniquesto augment the microstructure, value of hardness, tensile properties, tribological properties, and corrosion behaviour of castAl–Si and Al–Si–Mg alloys by the addition of strontium. Moreover, this review also focuses on the future scope of thesealuminium alloys for structural application in automobile and lightweight industries.

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