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Creep deformation and crack growth rates of a super α2 titanium aluminide alloy
AbstractThe influences of stress and temperature on creep deformation behavior and the creep crack growth rates of the super α2 Ti3Al alloy were investigated with respect to its safe application at high temperatures. In a temperature range of 1033–1093K at low applied stress levels, the stress exponent was equal to 1.5. At an intermediate stress range (10−3<σ/E<3×10−3), a stress exponent of 3.3 was observed. As the applied stress was increased, the stress exponent changed from 3.3 to 4.4. The high temperature crack growth rate of the Ti3Al alloy can be correlated with stress intensity factor K rather than C∗ at 1033K due to environmental embrittlement.
Creep deformation and crack growth rates of a super α2 titanium aluminide alloy
AbstractThe influences of stress and temperature on creep deformation behavior and the creep crack growth rates of the super α2 Ti3Al alloy were investigated with respect to its safe application at high temperatures. In a temperature range of 1033–1093K at low applied stress levels, the stress exponent was equal to 1.5. At an intermediate stress range (10−3<σ/E<3×10−3), a stress exponent of 3.3 was observed. As the applied stress was increased, the stress exponent changed from 3.3 to 4.4. The high temperature crack growth rate of the Ti3Al alloy can be correlated with stress intensity factor K rather than C∗ at 1033K due to environmental embrittlement.
Creep deformation and crack growth rates of a super α2 titanium aluminide alloy
Kim, Ho-Kyung (Autor:in)
07.10.2008
6 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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