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Magnetic susceptibility of Inconel alloys 718, 625, and 600 at cryogenic temperaturesAfter a hydrogen fuel bleed valve problem on the Discovery Space Shuttle was traced to the strong magnetization of Inconel 718 in the armature of the linear variable differential transformer near liquid hydrogen temperatures, the ac magnetic susceptibility of three samples of Inconel 718 of slightly different compositions, one sample of Inconel 625, and on sample of Inconel 600 were measured as a function of temperature. Inconel 718 alloys are found to exhibit a spin glass state below 16 K. Inconel 600 exhibits three different magnetic phases, the lowest-temperature state (below 6 K) being somewhat similar to that of Inconel 718. The magnetic states of the Inconel alloys and their magnetic susceptibilities appear to be strongly dependent on the exact composition of the alloy.
Document ID
19920030511
Document Type
Conference Proceedings
Authors
Goldberg, Ira B. (Rockwell International Science Center Thousand Oaks, CA, United States)
Mitchell, Michael R. (Rockwell International Science Center Thousand Oaks, CA, United States)
Murphy, Allan R. (Rockwell International Science Center Thousand Oaks, CA, United States)
Goldfarb, Ronald B. (Rockwell International Science Center Thousand Oaks, CA, United States)
Loughran, Robert J. (NIST Boulder, CO, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1990
Subject Category
METALLIC MATERIALS
Funding Number(s)
CONTRACT_GRANT: NAS8-40000
Distribution Limits
Public
Copyright
Other