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A study of reduced chromium content in a nickel-base superalloy via element substitution and rapid solidification processingA study of reduced chromium content in a nickel base superalloy via element substitution and rapid solidification processing was performed. The two elements used as partial substitutes for chromium were Si and Zr. The microstructure of conventionally solidified materials was characterized using microscopy techniques. These alloys were rapidly solidified using the chill block melt spinning technique and the rapidly solidified microstructures were characterized using electron microscopy. The spinning technique and the rapidly solidified microstructures was assessed following heat treatments at 1033 and 1272 K. Rapidly solidified material of three alloys was reduced to particulate form and consolidated using hot isostatic pressing (HIP). The consolidated materials were also characterized using microscopy techniques. In order to evaluate the relative strengths of the consolidated alloys, compression tests were performed at room temperature and 1033 K on samples of as-HIPed and HIPed plus solution treated material. Yield strength, porosity, and oxidation resistance characteristics are given and compared.
Document ID
19870016023
Acquisition Source
Legacy CDMS
Document Type
Thesis/Dissertation
Authors
Powers, William O.
(Illinois Univ. Urbana-Champaign, IL, United States)
Date Acquired
September 5, 2013
Publication Date
May 1, 1987
Subject Category
Metallic Materials
Report/Patent Number
NAS 1.26:179631
NASA-CR-179631
Accession Number
87N25456
Funding Number(s)
CONTRACT_GRANT: NAG3-325
PROJECT: RTOP 505-63-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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