Production of etial 171 (AlSi10Mg) aluminium alloy based SiCp reinforced metal matrix composite piece by die casting method and investigation of mechanical properties

PRODUCTION OF ETİAL 171 (AlSi10Mg) ALUMINIUM ALLOY BASED SiCp REINFORCED METAL MATRIX COMPOSITE PIECE BY DIE CASTING METHOD AND INVESTIGATION OF MECHANICAL PROPERTIES(M.Sc. Thesis)Harun BAYARGAZİ UNIVERSITYINSTITUTE OF SCIENCE AND TECHNOLOGYDecember 2009ABSTRACTIn this study, aluminum based SiCp reinforced metal matrix composite materials had been produced by vortex method and at the same time these materials were moulded under high pressure by die casting machine. The aluminium material was reinforced with 10 vol. % of SiC particles with an average size of 64?m. Etial 171 which is suitable for die casting, was chosen as a metal matrix. By this method; samples were produced at ten different parameters under five different pressures; five samples were produced as Al-alloy, other five samples were produced as metal matrix composites. Die casting machine pressure and inside pressure of mould values were 50, 100, 150, 200, 250 kg/cm2; 313, 625, 938, 1250, 1563 kg/cm2. The casting temperatures were between 670 and 680 ?C. Die casting mould was produced to be casted Charpy and tensile samples. Tensile strength test, Charpy impact test, hardness test, investigation of microstructure by optical microscope and porosity test were performed on those samples. Composite samples? hardness were increased after adding SiC particles. It was observed that; composite samples? hardness average value is 96 BHN, unreinforced alloy samples? hardness average value is 86 BHN. It was observed that; composite samples? tensile and yield strengths average values are 233 MPa and 153 MPa, unreinforced alloy samples? tensile and yield strengths average values are 279 MPa and 186 MPa. It was observed that increasing the pressure of injection causes decreasing porosity value is % 0,2.Scence code : 708.3.028Key Words : SiCp, metal matrix composite, Vortex method, particle, diecasting, Al-alloyPage number : 105Adviser : Assist. Prof. Dr. Çetin KARATAŞ