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Impact Behavior of Extrinsically Toughened Discontinuously Reinforced Aluminum Composites

Published online by Cambridge University Press:  10 February 2011

M. A. Irfan ,
N. Liou  and
V. Prakash
M. A. Irfan
Affiliation:
Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, OH-44106. [email protected], [email protected], [email protected]
N. Liou
Affiliation:
Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, OH-44106. [email protected], [email protected], [email protected]
V. Prakash
Affiliation:
Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, OH-44106. [email protected], [email protected], [email protected]
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Abstract

Discontinuously reinforced aluminum (DRA) composites with enhanced fracture toughness have recently been developed at ALCOA. The approach consists of producing a composite microstructure in which discrete ductile phases have been incorporated into the DRA through traditional powder processing routes. In the present paper, the high strain rate behavior of these toughened composites is investigated by obtaining (i) the dynamic flow characteristics at various levels of elevated strain rates using a split Hopkinson compression bar, and (ii) energy absorption during dynamic crack initiation and crack propagation using three-point bend specimens loaded on a modified Hopkinson bar configuration.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 434: Symposium U – Layered Materials for Structural Applications , 1996 , 219
Copyright
Copyright © Materials Research Society 1996

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