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Ensinger PEI

Ti-24Al-11Nb Titanium Aluminide
Categories: Metal; Intermetallic

Material Notes: Alpha-2 Titanium Aluminide Ti3Al based alloy. Ti-24Al-11Nb refers to the atomic percentage composition. The niobium addition improves stress rupture and elevated temperature strength versus Ti3Al. 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 PropertiesMetricEnglishComments
Tensile Strength, Ultimate 824 MPa120000 psiWidmanstätten microstructure
 967 MPa140000 psiFine Widmanstätten microstructure
Tensile Strength, Yield 761 MPa110000 psiFine Widmanstätten microstructure
 787 MPa114000 psiWidmanstätten microstructure
Elongation at Break 0.7 %0.7 %Widmanstätten microstructure
 4.8 %4.8 %Fine Widmanstätten microstructure
Creep Strength 380 MPa
@Temperature 650 °C,
Time 161000 sec
55100 psi
@Temperature 1200 °F,
Time 44.7 hour
Widmanstätten microstructure
 
Component Elements PropertiesMetricEnglishComments
Aluminum, Al 13.5 %13.5 %by weight
Niobium, Nb (Columbium, Cb) 21.3 %21.3 %by weight
Titanium, Ti 65.1 %65.1 %by weight

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MIAL025 / 143019

Proto3000 – 3D Engineering Solutions

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