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Mechanical Behavior and Constitutive Modeling During High Temperature Deformation of Al Laminated Metal Composites

Published online by Cambridge University Press:  10 February 2011

R. B. Grishaber ,
R. S. Mishra  and
A. K. Mukherjee
R. B. Grishaber
Affiliation:
Department of Chemical Engineering and Material Science, University of California, Davis, California 95616, U.S.A., [email protected]
R. S. Mishra
Affiliation:
Department of Chemical Engineering and Material Science, University of California, Davis, California 95616, U.S.A., [email protected]
A. K. Mukherjee
Affiliation:
Department of Chemical Engineering and Material Science, University of California, Davis, California 95616, U.S.A., [email protected]
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Abstract

A constitutive model for deformation of a novel laminated metal composite (LMC) which is comprised of 21 alternating layers of Al 5182 alloy and Al 6090/SiC/25p metal matrix composite (MMC) has been proposed. The LMC as well as the constituent or neat structures have been deformed in uniaxial tension within a broad range of strain-rates (i.e. 10−5 to 100 s−1) and homologous temperatures (i.e. 0.8 ≥ 0.95 Tm). The results of these experiments have led to a thorough characterization of the mechanical behavior and a subsequent semiempirical constitutive rate equation for both the Al 5182 and Al 6090/SiC/25p when tested monolithically. These predictive relations have been coupled with a proposed model which takes into account the dynamic load sharing between the elastically stiffer and softer layers when loaded axially during isostrain deformation of the LMC. This model has led to the development of a constitutive relationship between flow stress and applied strain-rate for the laminated structure.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 434: Symposium U – Layered Materials for Structural Applications , 1996 , 267
Copyright
Copyright © Materials Research Society 1996

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