Effect of heat treatment on tribological behavior of zinc aluminum alloy reinforced with graphite and SIC particles for journal bearing

Author： Prasannakumar M Basavarajappa S Viswanatha BM

Publisher： Emerald Group Publishing Ltd

E-ISSN： 1758-5775|67|4|292-300

ISSN： 0036-8792

Source： Industrial Lubrication and Tribology, Vol.67, Iss.4, 2015-06, pp. : 292-300

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Abstract

Purpose– The purpose of the paper is to study the dry sliding wear behavior of as-cast and heat-treated zinc-aluminum (ZA-27) alloy, reinforced with silicon carbide and graphite particles.Design/methodology/approach– The alloy and composite samples were prepared with stir casting technique. Heat treatment was carried out for samples at a temperature of 370°C followed by quenching in water at room temperature. Subsequently, the heat-treated samples were aged at 180°C and quenched in water at room temperature. The wear tests were carried using pin-on-disc apparatus at room temperature at different applied loads, sliding speed and sliding distance.Findings– The wear volume loss of as-cast samples was more compared with heat treated samples. Composites exhibited improved wear resistance than base alloy.Originality/value– Hybrid metal matrix composites with heat treatment has exhibited superior wear behavior in dry sliding conditions.