Analysis and prevention of Kovar phase transformation failures in cryogenically operated sensors and instruments

Details Analysis and prevention of Kovar phase transformation failures in cryogenically operated sensors and instruments Analysis and prevention of Kovar phase transformation failures in cryogenically operated sensors and instruments

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1340..251t&link_type=abstract

IN: Cryogenic optical systems and instruments IV; Proceedings of the Meeting, San Diego, CA, July 10-12, 1990 (A92-22851 08-31).

Physics

Cryogenic Equipment, Instrument Compensation, Kovar (Trademark), Sensors, Iron Alloys, Phase Stability (Materials), Thermal Stability

Scientific paper

Metallurgical and physical property changes in Kovar, an Fe-Ni-Co alloy, associated with the phase transformation phenomenon and factors which affect the stability of austenitic structures are discussed. Martensitic phase transformation is considered to be a critical concern to designers of cryogenic instruments for avoiding transformation-induced failures. Problems under consideration include properties of iron-nickel alloys and Kovar alloy, austenite stability in Kovar alloy, and phase transformation testing.

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