SYMPOSIA PAPER Published: 01 January 1976
STP27887S

Thermal-Stress Fatigue Behavior of Twenty-Six Superalloys

Source

The comparative thermal-stress fatigue resistances of 26 nickel- and cobalt-base alloys were determined by fluidized bed tests. Cycles to cracking differed by almost three orders of magnitude for these materials, with directional solidification and surface protection showing definite benefit. The alloy-coating combination with the highest thermal-stress fatigue resistance was directionally solidified NASA TAZ-8A with an RT-XP coating. Its oxidation resistance was also excellent, showing approximately a ½ percent weight loss after 14 000 fluidized bed cycles.

Author Information

Bizon, PT
National Aeronautics and Space Administration Lewis Research Center, Cleveland, Ohio
Spera, DA
National Aeronautics and Space Administration Lewis Research Center, Cleveland, Ohio
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Details
Developed by Committee: E08
Pages: 106–122
DOI: 10.1520/STP27887S
ISBN-EB: 978-0-8031-4685-3
ISBN-13: 978-0-8031-0586-7