Influence of Tribological Parameters on Single and Multi-indenter Scratch Behavior of Aluminum Alloy

Abstract

Abstract. The aim of the present paper is to study aluminum alloy behavior against single and multi-indenter scratch tests. An experimental device was designed. Scratch test, using a steel conical indenter, was carried out at a constant sliding velocity of 210 mm/min. First of all, the influence of tribological parameters on apparent friction coefficient was investigated. Four attack angles of 10, 30, 45 and 60° are selected. The normal load was varied from 10 to 25N by increment of 5N. Moreover, the study of the wear mechanisms by microscopic observation has been conducted. It has shown that tribological parameters have an essential influence on the apparent friction coefficient and wear mechanism. Then correlation between tribological parameters and wear mechanisms has been highlighted. This correlation allowed elaborating a map wear for both single and multi-indenter scratch tests. Finally, comparison between single and multi-indenter scratch test has been performed in order to understand the effect of interaction between scratches.

On Material Removal Mechanism in High Speed Single Grit Scratch-Grinding of Cryo-Treated Al2024-T351 Aluminium Alloy

“…al. [7] exhibited ploughing, wedge formation (transition) and cutting as major material removal mechanisms for aluminium alloys. While ploughing mechanism was more pronounced at small attack angles cutting mechanism was predominant at higher attack angles.…”