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Effect of Grain Size on the Deformation and Dynamic Recrystallization of Mg-3Al-1Zn
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2004
Year
Materials ScienceMaterials EngineeringCommon WroughtEngineeringHigh Temperature MaterialsSevere Plastic DeformationMechanical EngineeringMagnesium-based CompositeDynamic RecrystallizationHot WorkingSolidificationMicrostructure BehaviourGrain SizeThermomechanical ProcessingMechanics Of MaterialsMicrostructureStructural Materials
The influence of grain size on the deformation of extruded Mg-3Al-1Zn tested in tension at temperatures between room temperature and 300°C is investigated. The results enable estimation of the deformation conditions for the transition from slip to twinning dominated flow and for the initiation and completion of dynamic recrystallization. A map illustrating these critical parameters is constructed and it is shown that the operating conditions of the common wrought processes straddle key transitions in microstructure behaviour.