Accession Number : ADA339080

Title :   Modeling the Mechanical Behavior of Aluminum Laminated Metal Composites During High Temperature Deformation

Descriptive Note : Final rept. 1 Sep 93-31 Aug 97

Corporate Author : CALIFORNIA UNIV DAVIS DEPT OF CHEMICALENGINEERING AND MATERIALS SCIENCE

Personal Author(s) : Grishber, R. B. ; Mishra, R. S. ; Mukherjee, A. K.

PDF Url : ADA339080

Report Date : 29 DEC 1997

Pagination or Media Count : 23

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(exp-6) to 10/s) and moderate to high homologous temperatures (i.e. 0.3 >= 0.95 Tm ). The LMC structure exhibits a behavior somewhat closer to the MMC layers. The results of these experiments have lead to a thorough characterization of the neat layer's mechanical behavior and a subsequent semi-empirical constitutive rate equation for both the Al 5182 and Al 6O9O/SiC/25p. These predictive relations for the neat layers have been coupled with a proposed model for deformation. This deformation model has led to the development of a constitutive relationship between flow stress and applied strain rate for the laminated structure which has been compared with experimental data.

Descriptors :   *LAMINATES, *METAL MATRIX COMPOSITES, MECHANICAL PROPERTIES, ALUMINUM ALLOYS, DEFORMATION, STRAIN RATE.

Subject Categories : Laminates and Composite Materials
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE