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Master Bond adhesives

Ti-24.5Al-17Nb Titanium Aluminide
Categories: Metal; Intermetallic; Nonferrous Metal; Titanium Alloy

Material Notes: Titanium Aluminide Ti3Al based alloy. Ti-24.5Al-17Nb refers to the atomic percentage composition. The niobium addition of over > 15 atom%, and therefore formation of the O phase, improves toughness versus Ti3Al and lower Nb compositions. 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 940 MPa136000 psiWidmanstätten microstructure, primary alpha-2 grains
 1010 MPa146000 psiWidmanstätten microstructure
Tensile Strength, Yield 705 MPa102000 psiWidmanstätten microstructure, primary alpha-2 grains
 952 MPa138000 psiWidmanstätten microstructure
Elongation at Break 5.8 %5.8 %Widmanstätten microstructure
 10 %10 %Widmanstätten microstructure, primary alpha-2 grains
Creep Strength 380 MPa
@Temperature 650 °C,
Time 223000 sec
55100 psi
@Temperature 1200 °F,
Time 62.0 hour
Widmanstätten microstructure; Creep Rupture
Fracture Toughness 28.3 MPa-m½25.8 ksi-in½KIC; Widmanstätten microstructure
 
Component Elements PropertiesMetricEnglishComments
Aluminum, Al 13.1 %13.1 %by weight
Niobium, Nb (Columbium, Cb) 31.3 %31.3 %by weight
Titanium, Ti 55.6 %55.6 %by weight

References for this datasheet.

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