Deformation Behaviour of Al-Mg Alloy Bi-Crystal Micro-Pillar Evaluated by Micro-Compression Test

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  • Zheng Bo-Lun
    Precision and Intelligence Laboratory, Tokyo Institute of Technology
  • Nagoshi Takashi
    Precision and Intelligence Laboratory, Tokyo Institute of Technology National Institute of Advanced Industrial Science and Technology
  • Chang Tso-Fu Mark
    Precision and Intelligence Laboratory, Tokyo Institute of Technology
  • Hosoda Hideki
    Precision and Intelligence Laboratory, Tokyo Institute of Technology
  • Sato Tatsuo
    Precision and Intelligence Laboratory, Tokyo Institute of Technology
  • Sone Masato
    Precision and Intelligence Laboratory, Tokyo Institute of Technology

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Other Title
  • 微小圧縮試験による Al-Mg 合金双結晶の変形挙動評価
  • ビショウ アッシュク シケン ニ ヨル Al-Mg ゴウキンソウケッショウ ノ ヘンケイ キョドウ ヒョウカ

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Abstract

  In this paper, we fabricated two kinds of micro-sized pillars with a size of 10 μm×10 μm×20 μm from Al-Mg alloy with large grains by focused ion beam. One pillar is single crystalline with crystal orientation of [023] and the other is bi-crystalline with [023] and [225] crystal orientations. We conducted micro-compression tests for the two kinds of pillar. The mechanical testing of bi-crystalline pillar show stronger work-hardening than that of the single crystalline pillar. This could come from an increasing of deformation resistance by the grain boundary in bi-crystal. The strong sliding traces in deformed single crystalline pillar corresponded to (111)[101] slip system. It was observed in deformed bi-crystalline pillar that (111)[101] slip system was activated on the compression process and the sliding propagated to another slip system in other grains.<br>

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