The effects of periwinkle shell reinforcement in a grey cast iron metal matrix composite (using powder metallurgy)
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Grey cast iron is widely used in various engineering applications because of its cost
effectiveness and beneficial properties. However, due to the presence of graphite in its
microstructure its capacities are limited. Various engineering methods such as
compositing are researched into that may minmize these limitations and give the metal
a wider scope of application. In this project, periwinkle shell reinforced grey cast iron
composites were manufactured using the powder metallurgy method. The weight
percentage of periwinkle shell in the composite was varied in the following pattern: 5 %,
10 %, 15 %, 20 % and 25 %. The manufactured samples were subjected to various
tests namely: wear test, hardness test, tensile test, impact test and compressive test. It
was observed that the reinforcing grey cast iron with periwinkle shells improved the
wear rate, tensile strength and impact toughness of the matrix but has adverse effects
on its hardness and compressive strength.
Keywords
TJ Mechanical engineering and machinery