This Article Full Text (PDF) References Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Pitchumani, R. Articles by Jeong, H. Search for Related Content Social Bookmarking                         What's this?

An Eddy Current Technique for the Measurement of Constituent Volume Fractions in a Three-Phase Metal-Matrix Composite

Composites Manufacturing Science Laboratory, Center for Composite Materials, University of Delaware, Newark, DE 19716-3144

P. K. Liaw

Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN 37996-2200

S. C. Yao

Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213

D. K. Hsu

Center for Nondestructive Evaluation, Iowa State University, Ames, IA 50011

H. Jeong

Agency for Defense Development DaeJon, Korea

An eddy current technique is developed for the measurement of reinforcement and intermetallics concentrations in extruded particulate-reinforced metal-matrix composites. The technique employs a theoretical conductivity model which accounts for the constituent phases, together with a measurement of two anisotropic conductivities on the composite, for determining the reinforcement and intermetallics volume fractions.Towards implementation of this technique, an analytical model is described which relates the anisotropic conductivities of extruded particulate-reinforced composites to their microstructures. The volume fractions were calculated using eddy current measurements made on a wide range of silicon carbide particulate (SiC,) reinforced aluminum matrix composite extrusions. The calculated values are shown to be in good agreement with the actual metallographically measured volume fractions of the reinforcement and intermetallics. The technique may be adopted for an on-the-fly assessment of product quality in a processing environment.

Key Words: eddy current technique • nondestructive evaluation • product quality monitoring • volume fraction calculation • metal-matrix composites • electrical conductivities

Journal of Composite Materials, Vol. 28, No. 18, 1742-1769 (1994)
DOI: 10.1177/002199839402801801


CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter    What's this?