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Compressive Deformation of Hollow Microsphere Reinforced Metal Matrix Composites

Published online by Cambridge University Press:  15 February 2011

M. T. Kiser ,
M. He ,
B. Wuj  and
F. W. Zok
M. T. Kiser
Affiliation:
Materials Department, University of California, Santa Barbara, CA 93106-5050
M. He
Affiliation:
Materials Department, University of California, Santa Barbara, CA 93106-5050
B. Wuj
Affiliation:
Materials Department, University of California, Santa Barbara, CA 93106-5050
F. W. Zok
Affiliation:
Materials Department, University of California, Santa Barbara, CA 93106-5050
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Abstract

The compressive deformation characteristics of hollow alumina microsphere reinforced aluminum matrix composites have been studied through both experiments and finite element analysis of unit cell models. Tests have been performed on composites containing around 50 volume percent of microspheres. The effects of the matrix flow stress and microsphere morphology (characterized by the ratio of wall thickness to radius) have been examined. The measured strength enhancement due to the hollow microspheres was found to be considerably less than that predicted by the FEM calculations; a result of microsphere cracking. Experiments have been conducted to document the progression of such damage following casting and mechanical deformation. The potential of this class of composite for impact energy absorption applications is also explored.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 372: Symposium W1 – Hollow and Solid Spheres and Microspheres--Science and Technology , 1994 , 173
Copyright
Copyright © Materials Research Society 1995

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