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Proceedings Paper

Analysis and prevention of Kovar phase transformation failures in cryogenically operated sensors and instruments
Author(s): J. Brian Toft; Thomas G. Evans
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Paper Abstract

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.

Paper Details

Date Published: 1 November 1990
PDF: 7 pages
Proc. SPIE 1340, Cryogenic Optical Systems and Instruments IV, (1 November 1990); doi: 10.1117/12.23070
Show Author Affiliations
J. Brian Toft, Cincinnati Electronics Corp. (United States)
Thomas G. Evans, Cincinnati Electronics Corp. (United States)


Published in SPIE Proceedings Vol. 1340:
Cryogenic Optical Systems and Instruments IV
Ramsey K. Melugin; Gerald R. Pruitt, Editor(s)

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