Please use this identifier to cite or link to this item: http://localhost:8081/xmlui/handle/123456789/11356
Title: EXPERIMENTAL INVESTIGATION ON STIR CAST AI-Si BASE ALLOYS
Authors: Reddy, T. Venkata Siva
Keywords: MECHANICAL INDUSTRIAL ENGINEERING;STIR CAST AI-Si BASE ALLOYS;CONVENTIONAL LIQUID CASTING PROCESSES;METAL MATRIX COMPOSITES
Issue Date: 2006
Abstract: The increasing demand for lightweight, energy efficient materials, light metal matrix composites are bound to find many applications, provided they meet specific hardness and wear requirements, while maintaining reasonable mechanical properties. Conventional liquid casting processes face many potential problems. These include gas entrapment during turbulent filling operations, hot tearing of the solidifying metal, and shrinkage porosity formation. Hot tearing occurs during the solidification of alloys as a result of the dendritic network limiting the alloy's ductility in the semi-solid state. By mechanical stirring of partially solidified alloys, primary solid particles turn to spherical shape and disperse homogeneously in the residual liquid. Alloy slurry which suspends primary solid particles can keep its viscosity as low as that of a liquid by stirring and behaves thixotropically. New casting processes were developed by the use of these properties. Investigations relating to those stir castings have been mainly carried out in hypoeutectic alloys as yet. Much work has not been done in case on hypereutectic alloys. The present work deals with the hypoeutectic and hypereutectic of Al-Si alloys. A study is done for the improvement of mechanical and metallurgical properties using stir casting. Investigation is also done on stirring parameters (Speed and Time) with respect to properties and their micro structural studies. Investigation and comparison of the mechanical properties for conventional and stir cast alloys were studied using wear rate behavior, hardness profile and tensile property. Fracture surface of the tensile specimen is also studied using scanning electron microscopy analysis-.
URI: http://hdl.handle.net/123456789/11356
Other Identifiers: M.Tech
Research Supervisor/ Guide: Jain, N. K.
metadata.dc.type: M.Tech Dessertation
Appears in Collections:MASTERS' THESES (MIED)

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