Screw-rotation twinning through helical movement of triple-partials

Pan Liu, Kui Du, Jianxin Zhang, Lihua Wang, Yonghai Yue, Evan Ma, Yuefei Zhang, Ze Zhang, Mingwei Chen, Xiaodong Han

    Research output: Contribution to journalArticlepeer-review

    13 Citations (Scopus)

    Abstract

    By in situ uniaxial-tensile tests with dynamic and atomic scale observation, we report the quantitative investigation of strain-induced deformation-twinning process through incoherent twin boundary propagation in nanocrystalline Au. The consecutive and quantitative strain maps revealed that a strong compressive strain, up to 5.8%, was formed. A screw-rotation twinning mechanism by consecutive and collective screw-rotations of triple-partials along a [111] screw-axis is proposed. This twin generates a macro-strain of 0.707, same as the conventional shear twins, but in a helical manner.

    Original languageEnglish
    Article number121901
    JournalApplied Physics Letters
    Volume101
    Issue number12
    DOIs
    Publication statusPublished - 2012 Sep 17

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

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