Modeling of flow stress for magnesium alloy during hot deformation

Hot Compression Deformation Behavior of Mg-Gd-Nd-Zr Heat-Resistant Magnesium Alloy

“…For the low stress level (ασ<0.8) and high stress level (ασ>1.2), the relationship between flow stress and strain rate can be described by Equation (1) and Equation (2), respectively. Equation (3) is a hyperbolic sine law proposed by Sellars and Tegart [8], which can be applied to all the stress levels. Get the natural logarithms of both sides for Equations (1) and (2).…”

Constitutive model for elevated temperature flow stress of AZ41M magnesium alloy considering the compensation of strain

“…Understanding the constitutive behavior of magnesium alloys is also of great importance in optimizing their process parameters and hot workability. Therefore, special attention has been paid to developing a proper constitutive model describing the elevated temperature deformation behavior of magnesium alloys, such as AZ91 [14], AZ80 [15] and ZK60 magnesium alloy [16]. However, only the effects of strain rate and temperature are considered in lots of the previous investigations, the effect of strain is usually ignored.…”

Compressive deformation behavior modeling of AZ31 magnesium alloy at elevated temperature considering the strain effect

“…A phenomenological method was proposed by Sellars and McTegart 7 where the flow stress is expressed by the hyperbolic laws in an Arrhenius-type equation, has also been applied 8,9 . Qin et al 10 developed a model to determine the flow stress of magnesium alloy during hot deformation. Quan et al 11 predicted a constitutive model for the dynamic recrystallization evolution of AZ80 magnesium alloy based on stress-strain data.…”