Effect of surface etching on the lubricated sliding wear of an eutectic aluminium–silicon alloy |
| |
Authors: | S Das T Perry S K Biswas |
| |
Affiliation: | (1) Department of Mechanical Engineering, Indian Institute of Science, 560 012 Bangalore, India;(2) General Motors Research and Development Center, 30500 Mound Road, Warren, MI 48090-9055, USA |
| |
Abstract: | The paper presents a study of the formation of wear grooves on near-eutectic aluminium–silicon alloy flats, by sliding a steel ball. The formation of the grooves are tracked on etched and unetched flats as functions of normal load and sliding distance. The groove is initially formed by plastic flow, and then expanded by micro-abrasion as the ball continues to slide on the groove. Etching causes surface hardening of the alloy, but, more importantly creates a surface topology that reduces the peak contact pressure, which discourages further plastic flow in the subsurface. This effect is rationalised using an existing contact mechanical model of indentation of rough surfaces. |
| |
Keywords: | sliding wear aluminium– silicon alloy etching plasticity |
本文献已被 SpringerLink 等数据库收录! |
|