A titanium-based alloy

Abstract

A titanium-based alloy composition consisting, in weight percent, of: between 0.5 and 2.5% aluminium, between 0.5 and 1.5% vanadium, between 0.0 and 3.0% iron, between 0.0 and 1.0% chromium, between 0.0 and 3.0% nickel, between 1.0 and 4.0% molybdenum, between 0.0 and 1.0% silicon, between 0.0 and 0.2% boron, between 0.0 and 0.5% tin, between 0.0 and 0.5% zirconium, between 0.0 and 1.0% niobium, between 0.0 and 1.0% tantalum, between 0.0 and 0.5% calcium, between 0.0 and 0.5% carbon, between 0.0 and 0.5% manganese, the balance being titanium and incidental impurities, wherein one of iron and nickel is present in an amount of at least 2.0% and the other of iron and nickel is present in an amount of 1.0% or less.

1 . A titanium-based alloy composition consisting, in weight percent, of: between 0.5 and 2.5% aluminium, between 0.5 and 1.5% vanadium, between 0.0 and 3.0% iron, between 0.0 and 1.0% chromium, between 0.0 and 3.0% nickel, between 1.0 and 4.0% molybdenum, between 0.0 and 1.0% silicon, between 0.0 and 0.2% boron, between 0.0 and 0.5% tin, between 0.0 and 0.5% zirconium, between 0.0 and 1.0% niobium, between 0.0 and 1.0% tantalum, between 0.0 and 0.5% calcium, between 0.0 and 0.5% carbon, between 0.0 and 0.5% manganese, the balance being titanium and incidental impurities, wherein one of iron and nickel is present in an amount of at least 2.0% and the other of iron and nickel is present in an amount of 1.0% or less. 
     
     
         2 . The titanium-based alloy composition of  claim 1 , consisting of at least 1.0% aluminium. 
     
     
         3 . The titanium-based alloy composition of  claim 1 , consisting of at most 2.25% or less than 2.25% or 2.0% or less aluminium. 
     
     
         4 . The titanium-based alloy composition of  claim 1 , consisting of 0.5% or less iron. 
     
     
         5 . The titanium-based alloy composition of  claim 1 , consisting of 0.5% or less chromium, preferably 0.4% or less chromium. 
     
     
         6 . The titanium-based alloy composition of  claim 1 , consisting of 0.1% or more Si, preferably 0.2% or more Si, more preferably 0.5% or more Si. 
     
     
         7 . The titanium-based alloy composition of  claim 1 , consisting of 0.05% or more boron, preferably 0.1% or more boron. 
     
     
         8 . The titanium-based alloy composition of  claim 1 , consisting of 1.0% or more vanadium. 
     
     
         9 . The titanium-based alloy composition of  claim 1 , wherein Fe wt. %+Ni wt. %≤2.5%. 
     
     
         10 . The titanium-based alloy composition of  claim 1 , consisting of 1.5% or more Molybdenum, preferably 2.5% or more molybdenum, more preferably 2.75% or more molybdenum. 
     
     
         11 . The titanium-based alloy composition of  claim 1 , consisting of 3.25% or less Molybdenum. 
     
     
         12 . The titanium-based alloy composition of  claim 1 , wherein the microstructure of the alloy composition is 30-50 vol % β-phase at SPF temperatures with the remainder being α-phase. 
     
     
         13 . The titanium-based alloy composition of  claim 1 , wherein Fe wt. %+Ni wt. %+Cr wt. %≤3.5, preferably ≤3.0. 
     
     
         14 . The titanium-based alloy composition of  claim 1 , wherein Nb wt. %+Mo wt. %≤4.0. 
     
     
         15 . The titanium-based alloy composition of  claim 1 , wherein Zr wt. %+Sn wt. %+Mo wt. %≤4.0. 
     
     
         16 . The titanium-based alloy composition of  claim 1 , wherein Cr wt. %+Mn wt. %≤0.5. 
     
     
         17 . The titanium-based alloy composition of  claim 1 , consisting of 0.25% or more nickel. 
     
     
         18 . A thermoformed product made of the alloy composition of  claim 1 .