TitleReducing wear of steel rolling on Ti6Al4V operating in vacuum
SourceAsiatrib-2018, pp. 340-342
AuthorI. Shareef, T.L. Krantz


This work was motivated by qualification test results of a mechanism for a space telescope. During the test undesired wear debris was formed. Alternative materials and coatings were tested with intent to reduce wear and debris when steel has a misaligned rolling contact on Ti6Al4V. Testing was done using a vacuum roller rig mimicking the mechanism’s contact conditions. Ten configurations were tested, most of which resulted in significant wear debris. The best wear protection and least amount of visible debris was observed with the combination of hardened 440C, anodized Ti6Al4V smoothed by an ultrasonic process, and providing 1-micrometer thick nanocomposite coating to both rollers by sputtering. 


Asiatrib-2018, pp. 340-342