Titanium alloys and their methods of production
AssigneeGeneral Electric Company
InventorsAndrew Philip Woodfield, Thomas Froats Broderick, William Andrew Sharp, II
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Abstract
A composition of matter is generally provided, in one embodiment, a titanium alloy comprising about 5 wt % to about 8 wt % aluminum; about 2.5 wt % to about 5.5 wt % vanadium; about 0.1 wt % to about 2 wt % of one or more elements selected from the group consisting of iron and molybdenum; about 0.01 wt % to about 0.2 wt % carbon; up to about 0.3 wt % oxygen; silicon and copper; and titanium. A turbine component is also generally provided, in one embodiment, that comprises an article made from a titanium alloy. Additionally, methods are also generally provided for making an alloy component having a beta transus temperature and a titanium silicide solvus temperature.
Claims5
A method for forming an alloy component having a beta transus temperature and a titanium silicide solvus temperature, the method comprising:
- hot working a titanium alloy ingot at a temperature that is above the beta transus temperature, wherein the titanium alloy ingot comprises 6 wt % to 7 wt % aluminum;
- 2.5 wt % to 5.5 wt % vanadium;
- 0.1 wt % to 1 wt % iron;
- 0.1 wt % to 2 wt % molybdenum;
- 0.01 wt % to 0.2 wt % carbon;
- up to 0.3 wt % oxygen;
- 0.1 wt % to 2 wt % silicon;
- up to 2 wt % of zirconium;
- up to 2 wt % of tin;
- and a balance of titanium;
- hot working the titanium alloy ingot at a temperature that is below both the beta transus temperature of the alloy and the titanium silicide solvus temperature of the alloy;
- hot working the titanium alloy ingot at a temperature that is above the beta transus temperature of the alloy but below the titanium silicide solvus temperature of the alloy;
- hot working the titanium alloy ingot at a temperature that is below both the beta transus temperature of the alloy and the titanium silicide solvus temperature, thereby forming a billet;
- hot working the billet at a temperature below both the beta transus temperature of the alloy and the titanium silicide solvus temperature of the alloy to form a forging;
- and
- solution heat treating the forging at a temperature below the beta transus temperature of the alloy and the titanium silicide solvus temperature of the alloy.
Dependencies are inferred from the claim text.