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The effect of porosity and gamma-gamma' eutectic content on the low cycle fatigue behavior of hydrogen-charged PWA-1480Single crystal superalloys such as PWA 1480 are considered for turbopump blades in the main engines of the space shuttle. As fatigue resistance in a hydrogen environment is a key issue in this application, a study of the effect of porosity and gamma-gamma' eutectic content on the fatigue life of a hydrogen-charged PWA 1480 was performed. Porosity and eutectic were linked to fatigue initiation, and therefore reduction of either of both may be one means to improve fatigue life of PWA 1480 when hydrogen is present.
Document ID
19930022387
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Gayda, John (NASA Lewis Research Center Cleveland, OH, United States)
Dreshfield, Robert L. (NASA Lewis Research Center Cleveland, OH, United States)
Gabb, Timothy P. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 6, 2013
Publication Date
May 1, 1991
Publication Information
Publication: Structural Integrity and Durability of Reusable Space Propulsion Systems
Subject Category
Metallic Materials
Accession Number
93N31576
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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