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The effect of porosity and gamma-gamma-prime eutectic content on the fatigue behavior of hydrogen charged PWA 1480The study addresses the effect of systematically varying gamma-gamma-prime eutectic content and porosity level on the fatigue life of a hydrogen-charged single crystal PWA 1480 superalloy. Four microstructural variants are produced, and differences in gamma-gamma-prime eutectic morphology among the four processing variants are analyzed. Single valued tensile test data indicate that the tensile and yield strength of the PWA 1480 are degraded by hydrogen charging, with the exception of the material given a eutectic solution treatment. It is shown that the reduction of the fatigue life can be minimized by a duplex thermomechanical treatment consisting of a eutectic solution followed by hot isostatic pressing.
Document ID
19920029422
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Gayda, J.
(NASA Lewis Research Center Cleveland, OH, United States)
Dreshfield, R. L.
(NASA Lewis Research Center Cleveland, OH, United States)
Gabb, T. P.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 15, 2013
Publication Date
November 1, 1991
Publication Information
Publication: Scripta Metallurgica et Materialia
Volume: 25
ISSN: 0956-716X
Subject Category
Metallic Materials
Accession Number
92A12046
Distribution Limits
Public
Copyright
Other

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