SEDL / STP / STP1077-EB / STP19098S

A Comparison of the Acoustic Emission Generated from the Fracture and Decohesion of Graphite Nodules with Theoretical Predictions

Carpenter, SH
Professor of Physicsvisiting scholarscientist, University of DenverUniversity of DenverInstitute of Metals Research, DenverShenyang, CO

Zhu, Z
Professor of Physicsvisiting scholarscientist, University of DenverUniversity of DenverInstitute of Metals Research, DenverShenyang, CO

Pages: 9    Published: Jan 1991

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Abstract

It has been known for many years that the fracture and/or debonding of Inclusions or second phase particles during deformation can act as a source of acoustic emission. A number of experimental studies of this phenomena have been reported. Excellent theoretical investigations of the fracture of an elastic spherical particle in a plastic matrix have been carried out and expressions have been derived for the energy released during fracture. However, there is little work where a direct comparison between experimental data and theoretical predictions can be carried out. The purpose of this paper is to report on the acoustic emission generated from the fracture and/or decohesion of spherical graphite nodules during the compressive deformation of nodular cast iron. The correlations of the experimental acoustic emission data with theoretical predictions will be reported.