Establishment of Flow Stress Model of EW75 Alloy

Abstract:

The behavior evolvement of Mg-7.22Gd-4.84Y-1.26Nd-0.58Zr (EW75) magnesium alloy during the hot deformation process was discussed. The flow stress behavior of magnesium alloy over the strain rate range 0.002s^-1 to 2s^-1and the temperature range 623K to 773K had been researched on Gleeble-1500D hot simulator under the maximum deformation degree 60%. A mathematical model was established to predict the stress-strain curves of this alloy during deformation. The experimental results showed that the stress-strain curves were obviously affected by the strain rates and deformation temperatures. The mathematical model could predict the stress-strain curves when the strain rates were under 0.2^-1, but there was significant error in some of stress-strain curves when the strain-rate was 2^-1 by the reason of deformation temperature rising.

• Periodical: Applied Mechanics and Materials (Volumes 423-426)
• Pages: 241-246
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.423-426.241
• Online since: September 2013
• Authors: Ming Long Ma*, Kui Zhang
• Keywords: Constitutive Relationship, Flow Stress Model, Hot Deformation, Rare Earth Magnesium Alloy

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