High-temperature component, especially a turbine blade, and process for producing this component
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United States of America Patent
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Apr 25, 1995
Grant Date -
N/A
app pub date -
Jun 4, 1993
filing date -
Jun 13, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A turbine blade including a blade and blade foot. The blade foot is formed by a ductile material and the blade comprises a material which is brittle compared to the ductile material but resistant to high temperature. The two materials are alloys of the same base compositions but differ as to presence and/or quantity of at least one doping element. The alloys can be hot-compacted with the formation of a transition zone joining the blade and blade root wherein fine crystallites of the blade root interpenetrate coarse crystallites of the blade. The two materials can comprise a gamma-titanium aluminide containing 0.5 to 8 atomic percent of a dopant. The turbine blade exhibits outstanding mechanical properties at high temperatures, good ductility at room temperature and a long service life.
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