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Secondary orientation effects in a single crystal superalloy under mechanical and thermal loadsThe nickel-base single crystal superalloy PWA 1480 is a candidate blading material for the advanced turbopump development program of the SSME. In order to improve thermal fatigue resistance of the turbine blades, the single crystal superalloy PWA 1480 is grown along the low modulus zone axes (001) crystal orientation by a directional solidification process. Since cubic single crystal materials such as PWA 1480 exhibit anisotropic elastic behavior, the stresses developed within the single crystal superalloy due to mechanical and thermal loads are likely to be affected by the exact orientation of the secondary crystallographic direction with respect to the geometry of the turbine blade. The effects of secondary crystal orientation on the elastic response of single crystal PWA 1480 superalloy were investigated.
Document ID
19930022389
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kalluri, Sreeramesh
(Sverdrup Technology, Inc. Brook Park, OH., United States)
Abdul-Aziz, Ali
(Sverdrup Technology, Inc. Brook Park, OH., United States)
Mcgaw, Michael A.
(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
93N31578
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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