Influence of Silicon Carbide/Graphite addition on properties of AA6082 reinforced composites

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ABSTRACT

AA6082 matrix hybrid composites reinforced with different weight percentages (wt. %) of (SiC + Gr) ceramic particulates by conventional stir casting process is manufactured. The weight percentage of ceramic powder is varied from 4 wt. % to 12 wt. % in a stage of 4 wt. %. The microstructures, physical properties such as density and porosity, as well as mechanical properties like hardness and tensile strength of the fabricated hybrid composites, are analysed. The optical micrographs reveal the uniform distribution of (SiC + Gr) ceramic particulates in the aluminium matrix. Density and porosity of hybrid composite increases from 2.69 to 2.75 g/cm³ and 0.37% to 1.23% with increase in weight percentage of (SiC + Gr) ceramic particulates in the aluminium matrix from 0 wt. % to 12 wt. % respectively. Both the hardness and ultimate tensile strength have enhanced from 52 to 84 VHN and 163 to 189 MPa, respectively, with a reduction in percentage elongation from 8.6 to 5.2 with rise in weight percentage of (SiC + Gr) ceramic particulates in the aluminium matrix from 0 wt. % to 12 wt. %, respectively.

KEYWORDS:

• Aluminium matrix composites (AMCs)
• graphite (Gr)
• stir casting
• optical microscope (OM)
• silicon carbide (SiC)
• tensile strength

Additional information

Notes on contributors

Pardeep Sharma

Dr. Pardeep Sharma working as Assistant professor in department of mechanical engineering at Panipat Institute of Engineering and Technology, Panipat, India. He is having 12 years of experience. His research area includes Metal matrix composites, ball milling, friction stir welding and processing, bio-materials.

Krishan Paliwal

Dr. Krishan Paliwal working as Professor in department of mechanical engineering at Panipat Institute of Engineering and Technology, Panipat, India. He is having 25 years of experience. His research area includes Metal matrix composites, Photo-voltaic cells.

Vishal Dabra

Er. Vishal Dabra working as Assistant professor in department of mechanical engineering at Panipat Institute of Engineering and Technology, Panipat, India. He is having 8 years of experience. His research area includes Metal matrix composites, Evacuated tube, PV cells.

Satpal Sharma

Dr. Satpal Sharma working as Assistant professor in department of mechanical engineering at Gautam buddha university, Greater Noida, India. He is having 20 years of experience. His research area includes Metal matrix composites, ball milling, friction stir welding and processing, thermal spray coating.

Neeraj Sharma

Dr. Neeraj Sharma working as Associate professor in department of mechanical engineering at maharishi markendswar university, ambala, India. He is having 10 years of experience. His research area includes Metal matrix composites, ball milling, friction stir welding and processing, bio-materials.

Gurpreet Singh

Dr. Gurpreet Saini working as Assistant professor in department of mechanical engineering at Amity university, Greater Noida, India. He is having 10 years of experience. His research area includes Metal matrix composites, ball milling, friction stir welding and processing, bio-materials.