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Metallic alloy stability studiesThe dimensional stability of candidate cryogenic wind tunnel model materials was investigated. Flat specimens of candidate materials were fabricated and cryo-cycled to assess relative dimensional stability. Existing 2-dimensional airfoil models as well as models in various stages of manufacture were also cryo-cycled. The tests indicate that 18 Ni maraging steel offers the greatest dimensional stability and that PH 13-8 Mo stainless steel is the most stable of the stainless steels. Dimensional stability is influenced primarily by metallurgical transformations (austenitic to martensitic) and manufacturing-induced stresses. These factors can be minimized by utilization of stable alloys, refinement of existing manufacturing techniques, and incorporation of new manufacturing technologies.
Document ID
19830010489
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Firth, G. C.
(Lockheed-Georgia Co. Marietta, GA, United States)
Date Acquired
August 11, 2013
Publication Date
March 1, 1983
Publication Information
Publication: NASA. Langley Research Center Cryogenic Wind Tunnel Models
Subject Category
Research And Support Facilities (Air)
Accession Number
83N18760
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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