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Ensinger PEI

Alpha-2 Titanium Aluminide, Ti3Al
Categories: Metal; Intermetallic

Material Notes: 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. A range of stoichiometries is possible through elemental substitutions. Researchers are examining titanium aluminide applications in fields such as jet engine turbines because of their high temperature properties and low density.

May be cast. Difficult to process by ingot metallurgy, forging, or sheet rolling.

Key Words: Ti3Al
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Physical PropertiesMetricEnglishComments
Density 4.20 g/cc0.152 lb/in³
 
Mechanical PropertiesMetricEnglishComments
Tensile Strength, Ultimate 800 - 1140 MPa116000 - 165000 psi
Tensile Strength, Yield 700 - 990 MPa102000 - 144000 psi
Elongation at Break 0.00 - 10 %0.00 - 10 %
Modulus of Elasticity 145 GPa21000 ksi
 
Thermal PropertiesMetricEnglishComments
Melting Point 1600 °C2910 °F
Maximum Service Temperature, Air 650 °C1200 °FOxidation Limit
Maximum Service Temperature, Inert 760 °C1400 °FCreep Limit
 
Component Elements PropertiesMetricEnglishComments
Aluminum, Al 15.8 %15.8 %by weight
Titanium, Ti 84.2 %84.2 %by weight
 
Descriptive Properties
Critical Ordering Temperature1100°C
Crystal StructureD019Ordered HCP

References for this datasheet.

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