Constitutive Equations for 6061 Aluminum Alloy at Elevated Temperature

Abstract:

Isothermal compression tests were conducted on 6061 aluminum alloy using a Gleeble-3500 thermal simulator under constant strain rates and at deformation temperatures ranging from 623 to 773K, up to a 60% height reduction of the sample. The high temperature deformation behavior of 6061 aluminum alloy was characterized based on an analysis of the stress-strain curves. A set of constitutive equations for 6061 aluminum alloy were proposed by employing an Arrhenius-type equation. Material constants, A, n and activation energy Q were found to be functions of strain. The equations revealed the dependence of flow stress on strain, strain rate and temperature. In order to evaluate the accuracy of the deformation constitutive equations, the mean errors of flow stress between the experimental data and predicted results were plotted. The results showed that the predicted data agreed well with the experimental stress-strain curves.

• Periodical: Materials Science Forum (Volume 898)
• Pages: 387-391
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.898.387
• Online since: June 2017
• Authors: Zhi Shen*
• Keywords: 6061 Aluminum Alloy, Constitutive Equation, Isothermal Compression Test

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