Title: Tensile deformation behavior of magnesium alloy AZ31B at high temperature
Abstract: The high temperature deformation behavior of AZ31B magnesium alloy slab was researched by tensile test under strain rates 0.001 s-1 and 0.01 s-1 at temperature ranging from 250 to 450 ℃.Microstructure characteristic and forming performance parameter of the alloy such as normal anisotropy coefficient and elongation were obtained.The results show that there are peaks on all of the true stress-strain curves at different deformation conditions.The peak stress decreases with increasing the deformation temperature and decreasing the strain rate.The hardening rate decreases with increasing the deformation temperature.However,the hardening rate has little change when the deformation temperature is above 250 ℃.The normal anisotropy reaches the maximum when the temperature is 250 ℃ and the strain rate is 0.001 s-1.The elongation of the AZ31B magnesium alloy increase remarkably with increasing the deformation temperatures.Under dynamic recrystallization temperature of 250 ℃,the dynamic recrystallization speed accelerates with the increase of the strain rate.
Publication Year: 2008
Publication Date: 2008-01-01
Language: en
Type: article
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