Beta titanium compositions and methods of manufacture thereof
OwnerMing H. Wuinventor
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Abstract
A composition comprises about 8 to about 10 wt % molybdenum, about 2.8 to about 6 wt % aluminum, up to about 2 wt % vanadium, up to about 4 wt % niobium, with the balance being titanium, wherein the weight percents are based on the total weight of the alloy composition. A method for making an article comprises cold-working a shape from a composition comprising about 8 to about 10 wt % molybdenum, about 2.8 to about 6 wt % aluminum, up to about 2 wt % vanadium, up to about 4 wt % niobium, with the balance being titanium, wherein the weight percents are based on the total weight of the alloy composition; solution heat treating the shape; and cooling the shape.
Claims49
An alloy composition comprising:
- titanium;
- and
- a molybdenum equivalent weight of about 7 to about 11 wt %, wherein the weight percents are based upon the total weight of the alloy composition, wherein the alloy composition is superelastic and/or pseudoelastic.
A method for making an article comprising:
- working a shape, wherein the shape has a composition comprising titanium;
- and a molybdenum equivalent weight of about 7 to about 11 wt %, wherein the weight percents are based upon the total weight of the alloy composition;
- and wherein the molybdenum equivalent weights are determined by the equation (1)
- MOeq.=1.00Mo+0.28Nb+0.22Ta+0.67V+1.43Co+1.60Cr+0.77Cu+2.90Fe+1.54Mn+1.11Ni+0.44W−1.00Al (1) or the equation (2) MOeq.=1.00Mo+0.28Nb+0.22Ta+0.67V+1.43Co+1.60Cr+0.77Cu+2.90Fe+1.54Mn+1.11 Ni+0.44W+0.25(Sn+Zr+Hf)−1.00Al (2)
- wherein Mo is molybdenum, Nb is niobium, Ta is tantalum, V is vanadium, Co is cobalt, Cr is chromium, Cu is copper, Fe is iron, Mn is manganese, Ni is nickel, W is tungsten, Al is aluminum, Sn is tin, Zr is zirconium and Hf is hafnium;
- wherein the aluminum can be substituted by boron, carbon, gallium and/or germanium and wherein the respective chemical symbols represent the amounts of the respective elements in weight percent based on the total weight of the alloy composition;
- solution treating the shape;
- and
- cooling the shape.
A method for making an article comprising:
- cold working a shape from a composition comprising about 8 to about 10 wt % molybdenum, about 2.8 to about 6 wt % aluminum, up to about 2 wt % vanadium, up to about 4 wt % niobium, with the balance being titanium, wherein the weight percents are based on the total weight of the alloy composition;
- solution treating the shape;
- and
- cooling the shape.
A method comprising:
- cold working a wire having a composition comprising titanium;
- and a molybdenum equivalent weight of about 7 to about 11 wt %, wherein the weight percents are based upon the total weight of the alloy composition;
- and wherein the molybdenum equivalent weights are determined by the equation (1)
- MOeq.=1.00Mo+0.28Nb+0.22Ta+0.67V+1.43Co+1.60Cr+0.77Cu+2.90Fe+1.54Mn+1.11 Ni+0.44W−1.00Al (1) or the equation (2) MOeq.=1.00Mo+0.28Nb+0.22Ta+0.67V+1.43Co+1.60Cr+0.77Cu+2.90Fe+1.54Mn+1.11 Ni+0.44W+0.25(Sn+Zr+Hf)−1.00Al (2)
- wherein Mo is molybdenum, Nb is niobium, Ta is tantalum, V is vanadium, Co is cobalt, Cr is chromium, Cu is copper, Fe is iron, Mn is manganese, Ni is nickel, W is tungsten, Al is aluminum, S is tin, Zr is zirconium and Hf is hafnium;
- and wherein the respective chemical symbols represent the amounts of the respective elements in weight percent based on the total weight of the alloy composition;
- solution treating the wire;
- and
- heat treating the wire.
Dependencies are inferred from the claim text.