A study on the effect of thermo-mechanical parameters on the deformation behavior of Mg-3Al-1Zn

作者：Fatemi Varzaneh S M^*; Zarei Hanzaki A; Haghshenas M

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2008, 497(1-2): 438-444.

DOI：10.1016/j.msea.2008.07.039

• AZ31
• Hot deformation
• Constitutive
• Flow stress

The flow behavior of AZ31 magnesium alloy was examined at high (250-450 degrees C) and ultra high (above 450 degrees C) temperatures. These were carried out using the hot compression testing method. For temperatures ranging from 250 degrees C to 450 degrees C, the peak flow stress was modeled using a power law expression with activation energy of 164 kJ/mol, a strain rate exponent of 0.14 (steady-state) stress exponent of 6.6. Also, a value of n = 5 was found for the "sinh" type of equation. The correlation between flow stress and thermomechanical parameters was described in terms of microstructural evolutions. The results also indicated that the presence of liquid at temperatures above 470 degrees C did change the deformation mechanisms, thereby affecting the flow behavior at ultra high temperatures.

• 出版日期2008-12-15