Solidification pattern and microstructures of AZ91D magnesium alloy through rheoforming |
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Authors: | Email author" target="_blank">Wuxiao?WangEmail author Sen?Yuan Bailing?Jiang Wanqi?Jie |
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Institution: | (1) College of Materials Science and Engineering, Northwestern Polytechnical University, 710072 Xi’an, China;(2) School of Materials Science and Engineering, Xi’an University of Technology, 710048 Xi’an, China |
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Abstract: | The optical microscope, SEM and EDS were adopted to analyze the rheoforming solidification morphologies and microstructures
of deformed AZ91D magnesium alloy after isothermal treatment in semisolid state. The results show that primary α phase can
be formed through attachment growth, when the liquid fraction is small; and primary α phase will grow in dendrites, when the
liquid fraction is high. Eutectic solidification is carried out in the ways of both dissociated growth and symbiotic growth,
depending on the morphology of primary α phase. Liquid with eutectic concentration solidifies into lamina eutectic. During
solidification of the liquid pools inside grains, α phase can be formed through attachment growth. The eutectic solidification
was mainly carried out in the dissociated pattern. |
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Keywords: | magnesium alloy semisolid rheoforming solidified microstructure quenching microstructure solidification pattern |
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