Effect of temperature on friction and galling behavior of 7075 aluminum alloy sheet based on ball-on-plate sliding test

Publication date: Available online 16 July 2019Source: Tribology InternationalAuthor(s): Jue Lu, Yanli Song, Lin Hua, Pu Zhou, Guangju XieAbstractIn this work, the friction and galling properties of 7075 aluminum alloy sheet at different temperatures from ambient to 400 °C have been investigated by performing linear unlubricated reciprocating sliding tests on a ball-on-plate tribometer. It was found that a compacted layer could be formed on the worn surface and its effect on the friction behavior of the alloy was determined. Thereafter, coupled with dissolution-precipitation of the hard phase, a friction evolution model of the alloy was established and the friction mechanism at different temperatures was revealed. At 25 °C and 150 °C, the friction mechanism of 7075 aluminum alloy sheet is mainly ploughing friction. When higher than 300 °C, the dominant friction mechanism becomes the adhesive peeling-off.
Source: Tribology International - Category: Materials Science Source Type: research