The Effect of Roller Burnishing on Surface Hardness and Roughness of Aluminum Alloy

摘要

Burnishing is a chip less machining process in which a rotating roller or ball is pressed against a metal piece. It is a cold working process and involves plastic deformation to the surface irregularities. Simple roller-burnishing tool was used for the experimental work of the present study. Surface texture and micro hardness tests, were applied to demonstrate the effects of the burnishing force and feed rates on the surface roughness and surface hardness of commercially available aluminum. A detailed experimental program was used in this study where specimens were subjected to different levels of feeding speed and burnishing force. The roughness and micro hardness were measured at the end of each burnishing combination of feeding speed and burnishing force. Significant enhancement in the surface roughness values were clearly observed, meanwhile, very little enhancement to the surface hardness were encountered. The best results were obtained at the lowest value of the burnishing feed rate and maximum burnishing force used in this investigation.