2003•Materials for Mechanical EngineeringRequires access

Flow Stress Behaviors of the Elevated Temperature Compression Deformation for Al-8.4Zn-2.2Mg-2.4Cu Alloy

Yuan Ge

Abstract

The flow stress of the compression deformation for Al8.4Zn2.2Mg2.4Cu alloy in the temperature range of 250～450℃ and strain rate range of 1.0～0.001s-1 were studied by isothermal compression with Gleeble1500 simulated machine. The results show that the flow stress is controlled by strain rate and deformation temperature, the flow stress increases with increase of strain rate and decreases with increase of temperature. The flow stress of the alloy during hightemperature deformation can be described by ZenerHollomon parameter. Four characteristic constants of the alloy during plastic deformation at high temperature were derived from the interdependencies of flow stress, strain rate and temperature.

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Key concepts: Materials science, Flow stress, Strain rate, Isothermal process, Deformation (meteorology), Compression (physics), Atmospheric temperature range, Alloy