Properties of Journal Bearing Materials That Determine Their Wear Resistance on the Example of Aluminum-Based Alloys

Potential relations of tribological characteristics of aluminum antifriction alloys with their compositions and mechanical properties were investigated. In this regard, the properties of eight aluminum alloys containing tin from 5.4% to 11% doped with lead, copper, silicon, zinc, magnesium, and titanium were studied. Mechanical properties such as hardness, strength, relative extension, and impact strength were analyzed. Within the tribological tests seizure load and wear of material were evaluated and secondary structures were studied afterwards. The absence of a definitive correlation between tribological behavior and mechanical properties was shown. It was determined that doping tin over 6% is excessive. The seizure load of the alloys increases with the magnesium content. Secondary structures of the alloys with higher wear rates contain one order less magnesium and tin.

Automated summary

The research investigated the potential relations of tribological characteristics of aluminum antifriction alloys with their compositions and mechanical properties, showing that there is no definitive correlation between tribological behavior and mechanical properties. It was found that doping tin over 6% is excessive and the seizure load of the alloys increases with the magnesium content. Alloys with higher wear rates contain one order less magnesium and tin in their secondary structures.