Title: Flow stress and microstructure evolution of Al-6.2Zn-2.3Mg-2.3Cu alloy during hot compression deformation
Abstract: The high temperature compression tests of Al-6.2Zn-2.3Mg-2.3Cu aluminum alloy at different temperature and strain rate were carried out on GPL-1500 thermal simulation testing machine.The true stress-strain curves are obtained.The equation of deformation activation energy and flow stress-strain is worked out.The results show that the flow stress is influenced by deformation temperature and strain rate obviously;the flow stress decreases greatly with increasing of temperature and increases with increasing of strain rate.The flow stress of this aluminum alloy during high temperature deformation can be described by Zener-hollomon parameter(Z).The flow stress equation of Arrhenius relation modified by hyperbolic sine function is e·=1.282×100[sin(0.010σ)]4.9145exp(-134157/RT).
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
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