Bulk nanocrystalline titanium alloys with high strength

Abstract

Bulk nanocrystalline Ti-based alloys were produced by conventional cooling from the corresponding liquid or high temperature solid phase followed by annealing at an appropriate temperature for a certain amount of time. The titanium-based alloys have a composition represented by the following formula, Ti.sub.a Cr.sub.b Cu.sub.c M.sub.d wherein M is at least one metal element selected from the group consisting of Mn, Mo, Fe. a, b, c, and d are atomic percentages falling within the following ranges: 60<a<90, 2<b<20, 2<c<25, and 1<d<15. Generally, the titanium-based alloys are in a nanocrystalline state, sometimes coexisting with an amorphous phase. These titanium-based alloys are economically produced, free of porosity and high strength (twice as that of commercial alloys) with good ductility. Furthermore, these bulk nanocrystalline alloys can be made in large-sized ingots, thermally recycled and have good processability. These properties make these alloys suitable for various applications.

Dependencies are inferred from the claim text.