Advanced Turbine Engine Gas Generator (ATEGG) Fractography of Cast Nickel Base Superalloys.
Final rept. 1 Oct 75-30 Jun 78,
TELEDYNE CAE TOLEDO OHIO
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This report documents Teledyne CAEs efforts to correlate the fracture surfaces of cast nickel-base superalloys to known conditions of low cycle fatigue testing strain range partitioning. Rene 80 and In-100 low cycle fatigue test specimens supplied by NASA-Lewis and TRW materials laboratories were examined by means of scanning electron microscope SEM. The fractography obtained with the SEM can be compared to actual engine component failures, and will provide strong indications of the metal temperature, creep conditions, strain levels, and cycles imposed, during the events leading to component failure. Author
- Metallurgy and Metallography