Improving wear resistance of TA15 alloy by double reinforced network structure

Abstract

A novel interlocking dual-reinforced network structure was designed through laser metal deposition (LMD), enhancing the wear resistance of titanium alloys. The construction of the network structure facilitated grain refinement, increasing dislocation density and the proportion of low-angle grain boundaries. Moreover, due to the mismatch between in situ-formed TiB and the α-Ti matrix, TiB particles tended to detach during the wear process. These detached TiB particles contributed to lubrication and load-bearing in subsequent wear stages, shifting the wear mechanism from adhesive to abrasive wear. Consequently, compared with TA15 coatings, the in-situ generated biphasic network structure increased wear resistance by 65.2 %. This study provides a feasible strategy for designing advanced titanium alloy coatings with superior tribological performance.