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An acoustic emission study of plastic deformation in polycrystalline aluminiumAcoustic emission experiments were performed on polycrystalline and single crystal 99.99% aluminum while undergoing tensile deformation. It was found that acoustic emission counts as a function of grain size showed a maximum value at a particular grain size. Furthermore, the slip area associated with this particular grain size corresponded to the threshold level of detectability of single dislocation slip events. The rate of decline in acoustic emission activity as grain size is increased beyond the peak value suggests that grain boundary associated dislocation sources are giving rise to the bulk of the detected acoustic emissions.
Document ID
19790035445
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Bill, R. C. (NASA Lewis Research Center Cleveland, Ohio, United States)
Frederick, J. R. (NASA Lewis Research Center Cleveland, OH, United States)
Felbeck, D. K. (Michigan, University Ann Arbor, Mich., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1979
Publication Information
Publication: Journal of Materials Science
Volume: 14
Subject Category
METALLIC MATERIALS
Distribution Limits
Public
Copyright
Other