Abstract
In this study, the effect of elevated temperatures on dry sliding wear and the coefficient of friction of cast 332.0 Al-Si alloys has been investigated. Block on disc type of wear and friction testing machine was used. Dry sliding wear tests were performed at elevated temperatures and a contact load of 55 N against hardened steel disc. The mass loss of test material during dry sliding wear test was determined gravimetrically. The results for the 332.0 Al-Si alloys show that there are two temperature zones, whose boundary is determined by the critical temperature (T_c= 127°C), for wear rate or specific wear resistance at elevated temperatures.
The empirical wear rate or specific wear resistance expressions as a function of elevated temperature are derived using the data from experiments. Additionally, a Boltzmann- type approximation is formulated empirically for the coefficient of friction of these Al-Si alloys as a function of elevated temperature using a relation between the adhesion and friction coefficients.

Key words
332.0 Al-Si alloys, dry sliding wear, elevated temperatures, mild and severe wear, adhesion and friction coefficients

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