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Acoustic emission testing of 12-nickel maraging steel pressure vesselsAcoustic emission data were obtained from three point bend fracture toughness specimens of 12-nickel maraging steel, and two pressure vessels of the same material. One of the pressure vessels contained a prefabricated flaw which was extended and sharpened by fatigue cycling. It is shown that the flawed vessel had similar characteristics to the fracture specimens, thereby allowing estimates to be made of its nearness to failure during a proof test. Both the flawed and unflawed pressure vessel survived the proof pressure and 5 cycles to the working pressure, but it was apparent from the acoustic emission response during the proof cycle and the 5 cycles to the working pressure that the flawed vessel was very near failure. The flawed vessel did not survive a second cycle to the proof pressure before failure due to flaw extension through the wall (causing a leak).
Document ID
19740027732
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Dunegan, H. L.
(Dunegan/Endevco Livermore, Calif., United States)
Date Acquired
August 7, 2013
Publication Date
January 1, 1973
Subject Category
Machine Elements And Processes
Meeting Information
Meeting: International Conference
Location: San Antonio, TX
Start Date: October 1, 1973
End Date: October 4, 1973
Accession Number
74A10482
Funding Number(s)
CONTRACT_GRANT: NAS3-11183
Distribution Limits
Public
Copyright
Other

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