The LCF Behavior of Several Solid Solution Strengthened Alloys Used in Gas Turbine Engines
Keyword(s):
LCF tests were performed on production plate (16mm thick) materials of HAYNES® alloy No. 230, HASTELLOY® alloy X and INCONEL® alloy 617. The tests were conducted in air at 760, 871 and 982°C under the fully reversed strain controlled mode on materials in the annealed condition. The results showed that 230™ alloy possesses the best low cycle fatigue characteristics followed by alloy X and alloy 617 under all test conditions. The paper presents total strain range-life data, cyclic hardening/softening, and metallographic observations on selected failed samples. It is shown that oxidation plays a key role in fatigue-crack initiation in alloy 617.
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