Effects of grain boundary characteristics of steel on magnetoacoustic emission spectraConsideration is given to the effects of grain boundary characteristics on the properties of a magnetoacoustic emission spectra obtained by external ac magnetic field-driven domain wall motions. In studies with HY80 steel samples, it is found that the domain wall-defect interaction enhances as more grain boundary is introduced. The enhancement of the domain wall-defect interaction generates high amplitude magnetoacoustic emission pulses and reduces the rate of magnetoacoustic emission events by limiting domain wall motions.
Document ID
19900048030
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Namkung, M. (NASA Langley Research Center Hampton, VA, United States)
Yost, W. T. (NASA Langley Research Center Hampton, VA, United States)
Utrata, D. (Association of American Railroads Chicago, IL, United States)
Grainger, J. L. (AS&M, Inc. Hampton, VA, United States)
Kushnick, P. W. (PRC Kentron, Inc. Hampton, VA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1989
Subject Category
Metallic Materials
Meeting Information
Meeting: Nondestructive Monitoring of Materials Properties
Location: Boston, MA
Country: United States
Start Date: November 28, 1988
End Date: November 30, 1988
Sponsors: Battelle Memorial Inst., EPRI, Natl. Research Council of Canada