Failure Analysis of AISI 302 Steel Compression Spring Used in Flush and Purge Valve of Liquid Engine

Sushant Manwatkar; S.V.S. Narayana Murty; P. Ramesh Narayanan

doi:10.4028/www.scientific.net/MSF.830-831.705

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Atomic Oxygen Resistant Polysiloxane Coatings for Low Earth Orbit Space Structures
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Failure Analysis of AISI 302 Steel Compression Spring Used in Flush and Purge Valve of Liquid Engine
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Failure Analysis of AISI 302 Steel Compression Spring Used in Flush and Purge Valve of Liquid Engine

Abstract:

AISI 302 stainless steel is used for making compression springs for launch vehicle programmes. One such AISI 302 stainless steel compression spring used in flush and purge valve of liquid engine of a satellite launch vehicle failed during testing. The failure was at the second round of spring and it failed in a slanted type fracture. Detailed metallurgical analysis indicated that the failure was due to fatigue.