Ti-25Al-10Nb-3V-1Mo Titanium Aluminide

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Ti-25Al-10Nb-3V-1Mo Titanium Aluminide
Categories:	Metal; Intermetallic; Nonferrous Metal; Titanium Alloy
Material Notes:	Alpha-2 Titanium Aluminide Ti₃Al based alloy. Ti-25Al-10Nb-3V-1Mo refers to the atomic percentage composition. The niobium addition improves stress rupture and elevated temperature strength versus Ti₃Al, while the molybdenum addition also increases the elevated temperature strength. Intermetallic aluminides have good mechanical properties and stability to be used in high temperature environments. A thin protective Al2O3 coating forms to provide oxidative stability.
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Mechanical Properties	Metric	English	Comments

Tensile Strength, Ultimate	907 MPa	132000 psi	Colony structure, primary alpha-2 grains
	950 MPa	138000 psi	Fine Widmanstätten microstructure
	963 MPa	140000 psi	Widmanstätten microstructure, primary alpha-2 grains
	1042 MPa	151100 psi	Widmanstätten microstructure
	1097 MPa	159100 psi	Fine Widmanstätten microstructure, primary alpha-2 grains
Tensile Strength, Yield	745 MPa	108000 psi	Colony structure, primary alpha-2 grains
	759 MPa	110000 psi	Widmanstätten microstructure, primary alpha-2 grains
	823 MPa	119000 psi	Fine Widmanstätten microstructure
	825 MPa	120000 psi	Widmanstätten microstructure
	942 MPa	137000 psi	Fine Widmanstätten microstructure, primary alpha-2 grains
Elongation at Break	0.8 %	0.8 %	Fine Widmanstätten microstructure
	1.1 %	1.1 %	Colony structure, primary alpha-2 grains
	2.2 %	2.2 %	Widmanstätten microstructure
	2.6 %	2.6 %	Widmanstätten microstructure, primary alpha-2 grains
	2.7 %	2.7 %	Fine Widmanstätten microstructure, primary alpha-2 grains
Creep Strength	380 MPa @Temperature 650 °C, Time >=1.30e+6 sec	55100 psi @Temperature 1200 °F, Time >=360 hour	Widmanstätten microstructure; Creep Rupture
Fracture Toughness	13.5 MPa-m½	12.3 ksi-in½	K_IC; Widmanstätten microstructure

Component Elements Properties	Metric	English	Comments
Aluminum, Al	14.1 %	14.1 %	by weight
Molybdenum, Mo	2.0 %	2.0 %	by weight
Niobium, Nb (Columbium, Cb)	19.5 %	19.5 %	by weight
Titanium, Ti	61.2 %	61.2 %	by weight
Vanadium, V	3.2 %	3.2 %	by weight

References for this datasheet.

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MIAL027 / 143023

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