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De-twinning via secondary twinning in face-centered cubic alloys

机译:通过面心立方合金中的二次孪晶解孪晶

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摘要

We report a de-twinning process via secondary twinning in face-centred cubic structures with low stacking fault energies. A duplex stainless steel was deformed using high-pressure torsion. Primary twins with an average twin boundary (TB) spacing of-7 nm formed in the early stages of the deformation and this was followed by secondary twinning. The partial dislocations from the secondary twinning subsequently interacted with the primary TBs, leading to the de-twinning of the primary twins. As a result of the de-twinning process, the secondary twins with an average TB spacing of ~1.7 nm reached a maximum length of ~200 nm.
机译:我们报告了在具有低堆垛层错能量的面心立方结构中通过二次孪生进行的孪生过程。使用高压扭力使双相不锈钢变形。在变形的早期阶段形成了平均孪晶边界(TB)间隔为7 nm的初级孪生,随后进行了次级孪生。次生双胞胎的部分脱位随后与原发性结核相互作用,导致原发双胞胎解除缠绕。解缠过程的结果是,平均TB间隔约为1.7 nm的次生双胞胎的最大长度达到了200 nm。

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  • 来源
    《Materials Science and Engineering》 |2013年第20期|110-114|共5页
  • 作者单位

    School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, NSW 2006, Australia;

    School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, NSW 2006, Australia;

    School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, NSW 2006, Australia;

    School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, NSW 2006, Australia;

    Departments of Aerospace & Mechanical Engineering and Materials Science, University of Southern California, Los Angeles, CA 90089-1453, USA ,Division of Materials Science and Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, South Korea;

    School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, NSW 2006, Australia ,Australian Centre for Microscopy & Microanalysis, The University of Sydney, Sydney, NSW 2006, Australia;

    Departments of Aerospace & Mechanical Engineering and Materials Science, University of Southern California, Los Angeles, CA 90089-1453, USA ,Materials Research Croup, Faculty of Engineering and the Environment, University of Southampton, Southampton SO17 1BJ, UK;

    Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695, USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Severe plastic deformation; Steel; Twinning; De-twinning; Transmission electron microscopy;

    机译:严重的塑性变形;钢;孪生;去缠绕透射电子显微镜;

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