Behavior And Processing Diagram Of The Thermal Deformation Of AZ31 Magnesium Alloy

The plastic deformation behaviors of AZ31magnesium alloy duringdifferent temperatures and strain rates are studied by isothermal deformation teston Gleeble-1500and UTM5305thermal machanical simulator. The results showthat the ture stress of the material will be varies with deformation conditionschanging.With the strain rate lower and deformation temperature rises, ture stressand the of AZ31magnesi um alloy will significantly reduce.In this paper, theArrhenius function,Z exp(Q/RT) A(sinh())n, describe the relationshipbetween the ture stress of AZ31magnesium alloy of different strain rate andtemperature during the process of plastic deformation behavior. The alloy hotdeformation activation energy of the plastic deformation behavior, respectively,compression deformation activation energy is132.38kJ/mol, the stress factor α=0.0089MPa-1, stress exponent n=9.66; tensile deformation activation energy is255.26kJ/mol stress factor α=0.0148MPa-1, stress exponent n=15.78;AZ31magnesium alloy deformation temperature control the nucleationmechanism of DRX during the plastic deformation.At200℃and250℃, a largenumber of twins are observed and dynamic recrystallization occurs only at thegrain boundaries.With temperature rise, twins don’t exist in AZ31magnesiumalloy plastic deformation, the dynamic re-crystallized finer grain size, but withincreasing temperature, the grain along with growing up. AZ31magnesiumalloy deformation parameters in the process of plastic deformation behavior willdirectly affect the deformation mechanism inside the material, the deformationtemperature and strain rate will be reduced so that AZ31magnesium alloyinternal dynamic recrystallization effect is enhanced.Open the plastic deformation behavior of AZ31magnesium alloy safetyduring deformation mechanism, AZ31magnesium alloy internal functionalconversion rate will be increased. To establish that the thermoplastic materialdeformation behavior during thermal processing of the experimental data in Figplastic deformation behavior of AZ31obtained. When AZ31magnesium alloy in hot compression deformation during thermal processing diagram shows thatthe material at low temperature plastic deformation under high strain ratedeformation conditions and moderate temperatures, AZ31magnesium alloyappears unstable situation. AZ31magnesium alloy in hot tensile deformationduring thermal processing graph shows that at low temperatures when thematerial is deformed plastically deformed condition, AZ31magnesium alloycase there will be instability. Best of AZ31magnesium alloy hot deformationconditions for the deformation temperature eventually get around350℃, strainrate of compression deformation of0.5-0.05s-1, the tensile deformation processwhen0.001-0.00033s-1, AZ31magnesium alloy the maximum conversion rate ofthe functional material.