Abstract
The Al{sub 2}O{sub 3} and SiC reinforced aluminum composites exhibited different mechanisms of damage in response to compressive deformation. The F3S matrix SiC reinforced composite exhibited particle fracture, the amount of fracture increasing with decreasing test temperature due to the increase in local stress within the particles. However, at low temperatures both the damage and deformation become localized in the form of intense shear bands. In 2618 matrix Al{sub 2}O{sub 3} reinforced materials the as-received material contained small voids at the interfaces of the majority of the particles which through their growth prevented particle fracture due to the relaxation of the stress build up within the particles. At the high temperatures which would be employed in forging, neither material showed appreciable damage. However, the higher strain rates used in industrial forging practice could potentially cause damage in both composite materials.
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