Effect of Forging on Microstrutural Characteristic and Tensile Properties of In-Situ (TiB+TiC)/Ti Composite

In this work, 2.5vol.% (TiB+TiC)/Ti composite was prepared by in situ casting route then 1-D forging. The microstructure and tensile properties were presented and discussed. The results indicate that the as cast microstructure can be significantly modified by 1-D forging. After forging, TiB and TiC segregated at the prior beta grain boundaries within the as-cast composite tend to fracture and align perpendicular to forging direction. Reduction in aspect ratio of reinforcements and a lath is also observed. 1-D forging can enhance the strength and elongation of as cast composite significantly. However, the increment in strength is quite limited as strain temperature increases to 700 degree C. Additionally, Room temperature and high temperature fracture mechanisms are also discussed as well.