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

In 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 t...

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Bibliographic Details
Published in:Tribology international 2019-12, Vol.140, p.105872, Article 105872
Main Authors: Lu, Jue, Song, Yanli, Hua, Lin, Zhou, Pu, Xie, Guangju
Format: Article
Language:English
Subjects:
7075 aluminum alloy sheet
Aluminum alloys
Aluminum base alloys
Friction
Friction evolution model
Galling
High-temperature friction
Metal sheets
Precipitates
Sliding
Temperature effects
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Summary:In 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. •The friction and galling properties of 7075 aluminum alloy sheet were studied.•The formation and destruction mechanism of a compacted layer on the worn surface was determined.•The friction evolution model coupled with the dissolution-precipitation of hard phase was established.•The friction mechanism at different temperatures was revealed.•The dominant friction mechanism is ploughing at 25 °C and 150 °C and adhesive peeling-off higher than 300 °C.
ISSN:0301-679X
1879-2464
DOI:10.1016/j.triboint.2019.105872