Tensile and Fatigue Properties of TiB Whisker-Dispersed Titanium Matrix Composite

Abstract

Ti matrix composite has attracted much attention because of their potential to achieve higher specific strength than conventional Ti alloys. Titanium boride (TiB) is chemically stable in the Ti matrix and has a small difference in thermal expansion coefficient. Therefore, TiB whisker is particularly promising as a reinforcing filler in Ti matrix composite. TiB whisker-dispersed Ti matrix (Ti-TiB) composite has excellent tensile strength, although its fracture elongation is lower than Ti alloys. Moreover, the fatigue properties of Ti also are improved by controlling the orientation of TiB whiskers. This article explains the strengthening mechanism of tensile and fatigue properties of Ti-TiB composites.