Abstract
Thin gage Ni-base superalloy materials are being targeted for hypersonic applications up to 1100°C. To achieve an optimized system design, standard mechanical behavior data on these materials are needed under a range of loading conditions such as tensile, creep and fatigue at representative temperatures. In order to meet this need, a unique test system developed in-house for determining materials properties of very thin materials was used to determine the fatigue response of a high temperature Ni alloy, both with and without prior exposure to elevated temperatures. This paper examines the effects of elevated temperature exposure on the ductility and fatigue resistance of Haynes 230 with a thickness of 0.127mm.
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