High temperature deformation and fracture of a fiber reinforced titanium matrix composite

Abstract

The longitudinal tensile properties of a SiC fiber-reinforced Ti alloy have been investigated over the temperature range of 20–600°C. Experiments have been conducted at both constant strain rate and constant stress. The experimental results have been compared with predictions of models based on fiber fragmentation, matrix flow and creep, and load transfer via interfacial friction. The models predict trends that are similar to the experimental ones, though they generally overestimate the tensile strength and ductility and the creep rupture time. The possible origins of such discrepancies are briefly discussed.