ISSN: 0884-6804
Page Count: 4

Some Results from X-Ray Computed Tomography Applied to Metal Matrix Composites
Bathias, C
Conservatoire National des Arts et Métiers,

Dominguez, G
Instituto Tecnológico de Celaya,

Gonzalez, M
Conservatoire National des Arts et Métiers,

Abstract

This study presents computed tomography (CT) results from a medical scanner carried out on metal matrix composite materials obtained by a casting process. In order to test the capabilities of the CT technique to study the flaws in the sample, few precautions have been taken during the manufacturing process, resulting in composite ingots with many flaws (porosity, segregation, etc.). The mold was modified to obtain a concentration of particles at the bottom of the ingot. CT images and scanning electronic microscopy images were taken at the same slice surface and show good agreement in the distribution of particles and porosity. The spatial resolution of the medical scanner (12 pairs of lines/cm) lets us distinguish between, at the mesoscopic scale, heterogeneous distribution of particles and porosity, but not individual flaws.

Keywords:
metal matrix composites, computed tomography, aluminum matrix, nondestructive, medical scanner, characterization

Paper ID: CTR10624J
DOI: 10.1520/CTR10624J
ASTM International is a member of CrossRef.