High-strength discontinuosly-reinforced titanium matrix composites and method for manufacturing the same

摘要

The method for manufacturing high-strength discontinuously-reinforced titanium matrix composite comprises the following steps: (a) preparing a basic powdered blend containing the matrix alloy or titanium powders having a particle size 250 μm for 95% of the powder and powders, which reinforcing matrix during high-temperature operations, such as blended elemental reinforcing powders, ceramic powders, intermetallic powders, and/or powders of complex carbide- and/or boride particles that are at least partially soluble in the matrix, (b) preparing reinforcing powders by co-attrition, mechanical alloying, or pre-sintering of blended elemental powders with each other and graphite, (c) mixing the basic powdered blend with the Al-V master alloy powder, and co-attrited, mechanically-alloyed powders, and pre-sintered powders in the predetermined ratio to obtain a chemical composition of titanium matrix composite material, (d) compacting the powder mixture at room temperature by any of room temperature consolidation process, (e) sintering at the temperature providing at least partial dissolution of dispersing ceramic and/or intermetallic powders, (f) high-temperature deformation at the temperature range of 1500-2300° F. resulting in additional in-situ formation of re-enforced particulates, and (g) cooling.