Ternary Ti—Zr—O alloys, methods for producing same and associated utilizations thereof
The invention relates to a ternary Titanium-Zirconium-Oxygen (Ti—Zr—O) alloy, characterized in that it comprises from 83% to 95.15 mass % of titanium, from 4.5% to 15 mass % of zirconium and from 0.35% to 2 mass % of oxygen, with said alloy being capable of forming a single-phase material consisting of a stable and homogeneous a solid solution of Hexagonal Close Packed (HCP) structure at room temperature. The invention further relates to a method for producing such alloy as well as preferred applications and utilizations thereof.
1. A ternary Titanium-Zirconium-Oxygen (Ti—Zr—O) alloy comprising from 83% to 95.15 mass % of titanium, from 4.5% to 15 mass % of zirconium and from 0.35% to 2 mass % of oxygen, with the alloy being a single-phase material consisting of a stable and homogeneous α solid solution with Hexagonal Close Packed (HOP) structure at room temperature.
2. The alloy according to claim 1 , characterized in that it has a yield strength greater than or equal to 800 MPa.
3. The alloy according to claim 1 , characterized in that it has an ultimate tensile strength (UTS) of about or greater than 900 MPa.
4. The alloy according to claim 1 , characterized in that it has a total ductility of about 15% or more.
5. The alloy according claim 1 , characterized in that it is of the single-phase material up to temperatures close to the beta transus temperature.
6. The alloy according to any claim 1 , characterized in that it is biocompatible.
7. A method for producing a ternary alloy comprising from 83% to 95.15 mass % of titanium, from 4.5% to 15 mass % of zirconium and from 0.35% to 2 mass % of oxygen, with the alloy being a single-phase material consisting of a stable and homogeneous α solid solution with Hexagonal Close Packed (HOP) structure at room temperature wherein the starting product is a ternary alloy in a recrystallized condition, and it is cold-worked at room temperature to increase the mechanical strength thereof.
8. The method according to claim 7 wherein the cold-working comprises cold-rolling.
9. The method for producing a ternary alloy according to the claim 7 , characterized in that the cold-worked alloy is submitted to a heat treatment by heating the alloy at a temperature between 500° C. and 650° C. for a time from 1 minute to 10 minutes to restore the ductility of the alloy while preserving a high mechanical strength.
10. The method according to claim 7 , characterized in that the cold-working reaches a reduction ratio ranging from 40% to 90%.