Evolution of plasticity-based wear damage in gross sliding fretting of a Ti-6Al-4V non-conforming contact

• Main Authors: Mohd Tobi, A.L., Sun, W., Shipway, P.H.
• Format: Article
• Language: English
• Published: Elsevier Science Ltd 2017
• Subjects: TA401-492 Materials of engineering and construction. Mechanics of materials
• Online Access: http://eprints.uthm.edu.my/4388/1/AJ%202017%20%28154%29%20Evolution%20of%20plasticity-based%20wear%20damage.pdf; http://eprints.uthm.edu.my/4388/; http://dx.doi.org/10.1016/j.triboint.2017.01.010

This paper examines the evidence for a plasticity based wear mechanism in the fretting wear of Ti-6Al-4V. Driven by near-surface plastic strain accumulation, the generation of wear debris evolves from coarse metallic debris towards loose fine oxide debris generating W-shape wear scar. The overall wear effect however, is less pronounced at the later stages of wear due to a reduced propensity for plastic deformation in the contact associated with wear induced contact pressure reduction. The evidence suggests that the high wear rate at the early stages of a fretting test are due to debris generation associated with gross plasticity whilst at the later stages, lower wear is associated with less plasticity accumulation.