MATERIALS TRANSACTIONS · 2002 · 13 citations · 18 references
Natural SciencesMaterials EngineeringMaterials ScienceMechanical Behavior Of MaterialsMetallic MaterialsMetallurgyAlloysGrain RefinementGrain Structure AnalysisMetalsMicrostructure EvolutionPlasticityDynamic RecrystallizationGrain Boundary SlidingMagnesium AlloysRecrystallizationRecrystallization BehaviorSuperplastic DeformationSuperplasticityTensile Strain
Superplastic behavior and microstructural evolution in a commercial Mg–3Al–1Zn magnesium alloy were investigated at temperatures between 623 K and 723 K and strain rates between 10−5 and 10−3 s−1. Grain refinement was obtained in the test alloy due to the dynamic recrystallization during an initial stage of tensile test. As a result, the alloy exhibited good superplasticity at all strain rates and temperatures, and a maximum elongation of 314% was obtained. The results of optical microscopy and SEM revealed that the dominant deformation mechanism was grain boundary sliding, and the dynamic recrystallization was the accommodated mechanism for the deformation.
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