Effect of Strontium Addition on Semi-Solid Slurry Generation of Novel Al�15Mg2Si�4.5Si Composite During Cooling Slope Rheoprocessing

Das, P and Sultan, MA (2023) Effect of Strontium Addition on Semi-Solid Slurry Generation of Novel Al�15Mg2Si�4.5Si Composite During Cooling Slope Rheoprocessing. In: Transactions of the Indian Institute of Metals .

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Abstract

The present study examines the effect of melt treatment by inclusion of modifier (0.01 wt pct of Sr) into the composite melt on grain nucleation and coarsening of novel Al�15Mg2Si�4.5Si composite during semi-solid processing. The composite is processed at semi-solid state adopting rheoprocessing technique, by allowing the composite melt to flow along a cooling slope. The composite melt fills an isothermal holding furnace after exiting cooling slope. To understand the solidification transport phenomena of the composite during cooling slope rheoprocessing, an Eulerian multiphase flow CFD (computational fluid dynamics) model is developed here. The four phases considered in the present multiphase model are liquid (l), primary solid (Mg2Si), secondary solid (α-Al), and air (a). The simulation findings include grain sizes of primary solid and secondary solid, slurry velocity, viscosity as well as temperature, at different simulation times. The results are then validated with the help of experimentally obtained optical micrographs of oil-quenched slurry samples. The study findings are found to be helpful to establish process control during novel Rheo gravity die casting of the generated slurry, to develop automobile and mining components. © 2023, The Indian Institute of Metals - IIM.

Item Type:	Journal Article
Publication:	Transactions of the Indian Institute of Metals
Publisher:	Springer
Additional Information:	The copyright for this article belongs to Springer.
Keywords:	Coarsening; Computational fluid dynamics; Cooling; Die casting; Mining; Silicon, Al�15mg2si�4.5si composite; Composite melts; Computational fluid dynamics modeling; Cooling slopes; Grain coarsening; Grain nucleation; Melt treatments; Rheo gravity die casting; Semisolid slurries; Strontium addition, Strontium
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	01 Mar 2024 05:33
Last Modified:	01 Mar 2024 05:33
URI:	https://eprints.iisc.ac.in/id/eprint/83772

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