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Ensinger PEI

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Gamma Titanium Aluminide, TiAl
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 processed by ingot metallurgy or forging. Limited processability by casting. Difficult to sheet roll.


Composition table gives weight percent.

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Physical PropertiesOriginal ValueComments
Density 3.91 g/cc
 
Mechanical PropertiesOriginal ValueComments
Tensile Strength, Ultimate 450 - 800 MPa
Tensile Strength, Yield 400 - 650 MPa
Elongation at Break 0.00 - 4.0 %
Modulus of Elasticity 176 GPa
 
Thermal PropertiesOriginal ValueComments
Melting Point 1460 °C
Maximum Service Temperature, Air 900 °COxidation Limit
Maximum Service Temperature, Inert 1000 °CCreep Limit
 
Component Elements PropertiesOriginal ValueComments
Aluminum, Al 36 %
Titanium, Ti 64 %
 
Descriptive Properties
Critical Ordering Temperature1460°C
Crystal StructureL10Ordered Tetragonal

References for this datasheet.

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