Ti-matrix composites reinforced with Al2O3 fractions of up to 50 wt.% were fabricated by cold consolidation of powder mixtures using high-pressure torsion (HPT). The grain size of the Ti matrix was reduced to ∼ 100 nm. A relative density greater than ∼ 99 % was attained for composites containing up to 30 % Al2O3 following the rule of mixture. The Vickers microhardness increased with an increase in the Al 2O3 fraction but the bending stress and ductility decreased. The HPT-processed composites exhibited an abrupt increase in the hardness when they were annealed at 800-900 K, indicating a successful achievement of consolidation.
All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry