The wear of wrought aluminium alloys under dry sliding conditions

被引:45
作者
Ghazali, M. J. [1 ]
Rainforth, W. M. [1 ]
Jones, H. [1 ]
机构
[1] Univ Sheffield, Dept Mat Engn, Sheffield S1 3JD, S Yorkshire, England
基金
英国工程与自然科学研究理事会;
关键词
wear; mechanically mixed layer; aluminium alloys;
D O I
10.1016/j.triboint.2005.09.009
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
The sliding wear response of several wrought aluminium alloys (2124, 3004, 5056 and 6092) against a high purity alumina (99.9%) counterface was investigated, at a fixed sliding speed of 1 m/s and a load range of 23-140N. The counterface was chosen so as to minimise the chemically driven aspects of adhesive wear. Severe wear was observed at all loads, with specific wear rates ranging from 0.37 x 10(-4) to 2.37 x 10(-4) mm(3)/N m. In all cases a mechanically mixed layer (MML) was formed, principally from severely work hardened aluminium, alloy, but also including fine alumina particles. The thickness and morphology of the layer depended strongly on alloy composition, but the specific wear rate did not depend on the MML properties in a simple manner. The surface work hardening characteristics differed between alloys, but as with the MML, there was no simple relationship between surface work hardening characteristics and specific wear rate. The main correlation was found between the normalised wear rate and normalised pressure, which implies that the hardness of the starting aluminium alloy is the critical variable. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码:160 / 169
页数:10
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