2012•Applied Mechanics and MaterialsOpen access

Compression Deformation Behavior of AZ91D Magnesium Alloy at Elevated Temperature

Yue Sheng Chai, Yong Zhe Chen, Wen Feng Liu, Gang Chen Sun

Abstract

Hot compression tests of AZ91D magnesium alloy were performed on Gleeble1500 ranging from 0.001 to 1 s-1 and deformation temperature ranging from 200 to 400°C. The results show that flow stress is dependent on deformation temperature and strain rates．When strain rate is a constant, flow stress decreases with the increasing deformation temperature. Meanwhile, as deformation temperature is a constant, flow stress increases with the increase of strain rate, which can be demonstrated by a Zener-hollomon parameter in the hyperbolic-sine-type equation during hot compression deformation. The hot deformation activation energy is 176.01kJ/mol and the stress exponent is 7.85 during hot compression deformation of AZ91D magnesium alloy.

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Key concepts: Materials science, Deformation (meteorology), Flow stress, Strain rate, Compression (physics), Magnesium alloy, Composite material, Stress (linguistics)