Ｍｇ‐８％Ｌｉ合金の超塑性変形中の組織変化

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タイトル別名
  • Microstructural change during superplastic deformation of the Mg-8 mass % Li alloy.
  • Mg 8パーセント Li ゴウキン ノ チョウソセイ ヘンケイチュウ ノ ソシ

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Microstructural changes during superplastic deformation at 573K have been investigated of a Mg-8 mass%Li eutectic alloy under both cast and thermomechanically processed conditions. The elongation of about 300% is obtained for ascast specimen under the superplastic condition, which is increased by finer grain-structure developed by more rapid solidification. Needle like α phase is observed to change to an equiaxed shape during superplastic deformation, and the mvalue of 0.2 at the initial period correspondingly increases during the deformation. ln the specimen of the recrystallized structure, twinning is observed in the α phase at the initial stage of superplastic deformation. The α grains are found to grow during the deformation, while the refining of β grains takes place. As a result, the mean grain size is slightly increased during deformation. These microstructural changes will play an important role to exhibit superplasticity.

収録刊行物

  • 軽金属

    軽金属 42 (3), 125-131, 1992

    一般社団法人 軽金属学会

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