Pin-on-disc wear of precipitation hardened titanium copper alloys fabricated by powder metallurgy

Abstract

Titanium-2mass%Cu and Ti-10 mass%Cu alloys were fabricated by powder metallurgy. The alloys were precipitation hardened to observe effect of heat treatment to their wear property. It was found that hardness of the two alloys increased after solution treatment to 320 and 526HV, and after aging to 441 and 612HV. However, wear resistance, as characterized by friction coefficient and mass loss in a pin-on-disc wear test deteriorated. In term of wear resistance, a lamellar morphology of eutectoid αTi/Ti 2Cu was favorable to the homogenized morphology of heat treated alloys. Lowest specific wear rate was found in as-sintered Ti-10 mass%Cu, having a value of 1.16 × 10 -13m 3/N·m. © 2012 The Japan Institute of Metals.