Some aspects of damage and failure mechanisms at high strain-rate and elevated temperatures of particulate magnesium matrix composites

In this paper, a study of the damage and fracture mechanisms on a particulate metal matrix composite of magnesium base alloy, reinforced with SiC particles, is presented. Quasi-static and dynamic tensile tests were carried out at room and elevated temperatures. The effects of the temperature and str...

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Bibliographic Details
Published in:Composites. Part B, Engineering Engineering, 2003-01, Vol.34 (6), p.551-560
Main Authors: El-Saeid Essa, Y, Fernández-Sáez, J, Pérez-Castellanos, J.L
Format: Article
Language:English
Subjects:
A. Metal matrix composites
Applied sciences
Dispersion hardening metals
Dynamic
Exact sciences and technology
Magnesium alloys
Metals. Metallurgy
Powder metallurgy. Composite materials
Production techniques
Quasi-static
SiC particles
Strain-rate
Temperature
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Summary:In this paper, a study of the damage and fracture mechanisms on a particulate metal matrix composite of magnesium base alloy, reinforced with SiC particles, is presented. Quasi-static and dynamic tensile tests were carried out at room and elevated temperatures. The effects of the temperature and strain-rate on the broken and decohered particles were determined in the fracture zone and along the gauge length of the tested specimens. In quasi-static tests at room temperature the percentages of broken and decohered particles are similar; a temperature rise increases the percentage of decohered particles much more than the broken ones which maintains nearly constant. For dynamic tests, the percentage of broken particles is greater than of the decohered ones; the influence of the temperature on the percentage of broken or decohered particles is much less than in the quasi-static tests.
ISSN:1359-8368
1879-1069
DOI:10.1016/S1359-8368(03)00046-5