多結晶材料粒界強度に及ぼす結晶品質の影響

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  • 鈴木 研
    東北大学 工学研究科付属先端材料強度科学研究センター
  • 羅 軼凡
    東北大学 工学研究科
  • 三浦 英生
    東北大学 工学研究科付属先端材料強度科学研究センター

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タイトル別名
  • Effect of the crystallinity on the strength of grain boundaries in Polycrystalline materials

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<p>In this study, grain and grain boundary quality in terms of order of atomic arrangement of electroplated copper thin films was evaluated by using the IQ (Image Quality) value obtained from an electron back-scatter diffraction (EBSD) method, and the grain and grain boundary strength was evaluated by applying micro tensile test. In addition, in order to investigate the relationship between the strength and grain boundary quality, molecular dynamics (MD) simulations were applied to analyze the deformation behavior of a bicrystal sample and its strength. The variation of the strength and deformation property were attributed to the higher defect density around grain boundaries than that in grains, which impeded the development of slip systems.</p>

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