Experimental and Simulation Aspects Regarding LM6/Sicp Composite Plastic Deformation under Different Frictional Conditions

Experimental and Simulation Aspects Regarding LM6/Sicp Composite Plastic Deformation under Different Frictional Conditions

H. Joardar (Department of Mechanical Engineering, C.V Raman College of Engineering, Bhubaneswar, India), N.S. Das (Department of Mechanical Engineering, C.V Raman College of Engineering, Bhubaneswar, India), G. Sutradhar (Department of Mechanical Engineering, Jadavpur University, Kolkata, India) and S Singh (Department of Mechanical Engineering, KIIT, Bhubaneswar, India)
DOI: 10.4018/ijmfmp.2014070101
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Abstract

The deformation behaviour of solid aluminium alloy (LM6) and silicon carbide metal matrix composite cylinders under axi-symmetric compression over constant aspect ratios using different lubricants were examined. Dry condition and three different lubricants namely MoS2, graphite and white grease were prepared and cold upset forged. In the light of the previous studies, the calculations were made with the assumption that the curvatures of deformed specimens were in the form of a circular arc. The calculated radius of curvature of the bulge was found under different lubricating conditions. The flow curve of composite was determined by compression tests and data were used in simulation analysis. The FEA simulation was carried out using DEFORM software. Results gained by Finite Element Analysis and by experiment show high degree of similarity, so this way of modeling could be used for even more complex technology of plasticity.
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Introduction

Composite materials offer superior properties to conventional alloys for various applications as they have high stiffness, strength and wear resistance. The development of these materials started with the production of continuous fiber-reinforced composites. The high cost and difficulty of processing these composites restricted their applications and led to the development of discontinuously reinforced composites. Discontinuously reinforced composites have found commercial use in some applications, and among these, particle-reinforced composites are likely to reach the largest commercial application stage with their low cost, ease of fabrication, and improved properties. Particulate metal matrix composites can be produced economically by conventional casting techniques, and they usually posses higher elastic modulus and strength values after reinforcement. As the stiffness and strength are increased, a substantial decrease in ductility is obtained.

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