New Techniques in Nondestructive Testing by Acoustical and Exo-electron Emission

The report describes investigations of the frequency distribution of acoustical emission from growing fatigue cracks in 24-ST aluminum sheet. The fatigue cracks were introduced by a high-amplitude, low-cycle bending mode of deformation. Efforts were also devoted to investigating the post fatigue exo...

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Bibliographic Details
Main Authors: Chambers, Robert H, Hoenig, Stuart A
Format: Report
Language:English
Subjects:
ACOUSTIC PROPERTIES
ALUMINUM ALLOYS
CRACK PROPAGATION
EMISSIVITY
EXOELECTRON EMISSION
FATIGUE(MECHANICS)
METALS
NICKEL
NONDESTRUCTIVE TESTING
SECONDARY EMISSION
Test Facilities, Equipment and Methods
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Summary:The report describes investigations of the frequency distribution of acoustical emission from growing fatigue cracks in 24-ST aluminum sheet. The fatigue cracks were introduced by a high-amplitude, low-cycle bending mode of deformation. Efforts were also devoted to investigating the post fatigue exo- electron emission from nickel wires. See also AD0720357.