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Diffusion weldingDispersion-strengthened nickel alloys are sanded on one side and chemically polished. This is followed by a single-step welding process wherein the polished surfaces are forced into intimate contact at 1,400 F for one hour in a vacuum. Diffusion, recrystallization, and grain growth across the original weld interface are obtained during postheating at 2,150 F for two hours in hydrogen.
Document ID
19740012942
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Holko, K. H. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 3, 2013
Publication Date
March 26, 1974
Subject Category
General
Accession Number
74N21055
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-3,798,748|NASA-CASE-LEW-11388-2
Patent Application
US-PATENT-APPL-SN-293726|US-PATENT-APPL-SN-289033

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