Flow Stress Constitutive Equation of AZ31 Magnesium Alloy for Hot Compression
The AZ31 magnesium alloy flow stresses have been investigated in the strain rates of 0.03-3a-1 and temperature range of 300~400℃. The result showed that dynamic recovery and dynamic recrystallization occurred obviously during the hot compression of AZ31 magnesium alloy. In order to represent the flow stress of plastic deformation accurately, the constitutive equation was built by using the dynamic recovery model and dynamic recrystallization model, and its parameters of the constitutive equation were determined by multivariate nonlinear regression analysis. The two-step constitutive equation not only expressed the variation of flow stress with strain rate, deformation temperature and strain, but also revealed the characteristic of dynamic recrystallization kinetics of AZ31 magnesium alloy. Its accuracy was higher than the flow stress of hyperbolic sine model, and the maximum relative errors of two constitutive equation models calculation values compared with experiment data were 5％ and 6.5％ respectively.
AZ31 magnesium alloy Constitutive equation Dynamic recrystallization Hot compression deformation
Wen Hua Wu Yan Lou
College of Mechatronics and Control Engineering, Shenzhen University, Guangdong Shenzhen,518060, PR College of Mechatronics and Control Engineering, Shenzhen University, Guangdong Shenzhen,518060, PR
国际会议
2011 International Conference on Mechatronics and Materials Processing(2011年机电一体化与材料加工国际会议 ICMMP)
广州
英文
1614-1618
2011-11-18（万方平台首次上网日期，不代表论文的发表时间）