Purpose – This paper seeks to investigate the effect of roller burnishing on the surface roughness and hardness of Zn−5% Al alloyed by copper at varied percentages. Design/methodology/approach – Copper was added to molten Zn−5%Al cast alloy at different percentages, then the roller burnishing process with different parameters was carried out on the five Zamac5−Cu alloys, however the effect on the surface roughness and hardness was investigated. Findings – It was found that there is an enhancement on the hardness and the maximum is 18 per cent in Zamac5−10% Cu alloy. The best surfaces result was 0.05 μ m that obtained at 0.04 mm rev −1 burnishing feed rate in Zamac5−10% Cu alloy. Originality/value – The addition of copper is recommended to be added to Zamac5 up to percentage of maximum solubility of copper in Zamac5 alloy.
Industrial Lubrication and Tribology – Emerald Publishing
Published: Sep 27, 2011
Keywords: Surface roughness; Micro hardness; Microstructure; Surface texture; Alloys