Mechanical Behavior & Analysis of LM30 Aluminium MMC Reinforced with TiB2 for Piston at Elevated Temperature

MECHANICAL ENGINEERING

The growing steel prices have significantly affected the manufacturing expenditure in automobile and household industries, thus making a strong case for substituting steels with materials having lightweight and high-strength to weight ratio. The aluminum and its alloys have outstanding properties such as lightweight, wear, and corrosion resistance that make them suitable in numerous industrial applications. In today’s scenario, customer perceived Quality is very important in view of increasing competition in global market. The engine sector is one of the example in which customer expectations in terms of Quality & Cost are boosted across world. Pistons are required to meet two essential material requirements. One is resistance to deformation, or strength, under high combustion pressure and cyclic loads. This is required to perform at high compression range without fatigue ensuring safe working operations. The other requirement is toughness at high temperatures. This is required to perform at high temperature range without creep which is exposed to high flame areas. Aluminium metal matrix composites with reinforcing particles shows great results at elevated temperature. In present work, base aluminium metal matrix LM-30 reinforced with 5, 10, 15 and 20% of TiB2 were made using stir casting process. The new metal matrix composite (MMC) formed was tested for different elevated temperatures. This paper mainly focused on the results of stress- strain, hardness-reinforcement and micro structure analysis of AMMC.

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