The Constitutive Behavior of Al 7075 Aluminium Alloy under Hot Compression Test

Abstract:

The constitutive equation in hot working for Al 7075 aluminum alloy was obtained employing experimental data of stress-strain curve, in a wide range of temperature (250-450°C) and strain rate (0.002-2 s-1). The influence of temperature and strain rate on the deformation behavior is represented by the equation proposed by Sellar and McTegart, all material parameters are considered as function of equivalent strain. The force-height data was corrected with interpolation method in the way to eliminate the error at the measurement. To verify the constitutive equation two parameter were calculated average absolute relative error (AARE=6.42) and correlation coefficient (R=0.998), for the same purpose the measuring and calculated flow curve are plotted together, the results shows that the constitutive equation obtained is good describing the behavior of the material.

• Periodical: Materials Science Forum (Volume 752)
• Pages: 69-74
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.752.69
• Online since: March 2013
• Authors: Tareg S. Ben Naser, György Krallics
• Keywords: 7075 Aluminum Alloy, Constitutive Equation, Hot Compression Test

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