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Fatigue Crack Growth Rate of Inconel 718 Sheet at Cryogenic TemperaturesInconel 718 sheet material was tested to determine fatigue crack growth rate (FCGR) at cryogenic conditions representative of a liquid hydrogen (LH2) environment at -423 degree F. Tests utilized M(T) and ESE(T) specimen geometries and environments were either cold gaseous helium or submersion in LH2. The test results support a significant improvement in the fatigue crack growth threshold at -423 degree F compared to -320 degree F or 70 degree F.
Document ID
20060008099
Acquisition Source
Langley Research Center
Document Type
Technical Memorandum (TM)
Authors
Wells, Douglas (NASA Marshall Space Flight Center Huntsville, AL, United States)
Wright, Jonathan (Jacobs Sverdrup Technology, Inc. Huntsville, AL, United States)
Hastings, Keith (Jacobs Sverdrup Technology, Inc. Huntsville, AL, United States)
Date Acquired
September 7, 2013
Publication Date
December 1, 2005
Subject Category
Structural Mechanics
Report/Patent Number
NASA/TM-2005-213948
L-19198
Report Number: NASA/TM-2005-213948
Report Number: L-19198
Funding Number(s)
OTHER: 104-08-31
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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