Titanium alloy
AssigneesSafran, Timet Savoie, Centre National De La Recherche Scientifique, Universite De Lorraine, Office National d'Etudes et de Recherches Aerospatiales
InventorsEdern Menou, Jérome Delfosse, Yvon Millet
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Abstract
A titanium alloy includes, in content by weight 4.0% to 5.0% aluminium; 3.50% to 4.50% tin; 1.0% to 4.0% zirconium; 2.0% to 5.25% molybdenum; 1.0% to 2.50% niobium; 0.10% to 0.25% silicon; 0.10% to 0.18% oxygen; the remainder being titanium and unavoidable impurities, the alloy further being such that the Aleq criterion, referred to as equivalent aluminium content by weight, is less than or equal to 8.5%, the Aleq criterion being defined as Aleq=[Al]+[Sn]/3+[Zr]/6+10*[O] where, [Sn], [Zr] and [O] are the contents by weight of aluminium, tin, zirconium and oxygen respectively.
Claims19
A titanium alloy comprising, in content by weight:
- 4.0% to 5.0% aluminium;
- 3.50% to 4.50% tin;
- 1.0% to 4.0% zirconium;
- 2.0% to 5.25% molybdenum;
- 1.0% to 2.50% niobium;
- 0.10% to 0.25% silicon;
- 0.10% to 0.18% oxygen;
- the remainder consisting of titanium and unavoidable impurities,
- the alloy having an equivalent aluminium content by weight, denoted Aleq, less than or equal to 8.5% and calculated by application of the following formula:
- Aleq=+[Sn]/3+[Zr]/6+10*[O] where [Al], [Sn], [Zr] and [O] are the contents by weight in the alloy of aluminium, tin, zirconium and oxygen respectively, the alloy having a fraction of α2-phase at 650° that is less than or equal to 0.2% mol and wherein the alloy has a gradient of a fraction at the β-transus that is less than or equal to 0.89% mol/° C. in absolute value.
A titanium alloy comprising, in content by weight:
- 4.0% to 5.0% aluminium;
- 3.50% to 4.50% tin;
- 1.0% to 4.0% zirconium,
- 2.0% to 5.25% molybdenum;
- 1.0% to 2.50% niobium;
- 0.10% to 0.25% silicon;
- 0.10% to 0.18% oxygen;
- the remainder consisting of titanium and unavoidable impurities,
- the alloy having an equivalent aluminium content by weight, denoted Aleq, less than or equal to 8.5% and calculated by application of the following formula:
- Aleq=+[Sn]/3+[Zr]/6+10*[O] where [Al], [Sn], [Zr] and [O] are the contents by weight in the alloy of aluminium, tin, zirconium and oxygen respectively, the alloy having a gradient of a fraction at the β-transus that is less than or equal to 0.89% mol/° C. in absolute value.
Dependencies are inferred from the claim text.