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Kink deformation in a beta titanium alloy at high strain rate

机译：β钛合金在高应变速率下的扭结变形

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摘要

Kink deformation is uncommonly observed in Ti-35V-15Cr-0.3Si-0.1C beta titanium alloy deformed at 5 × 10~3s~(-1). Band structures have formed on the deformed samples. Electron back scattered diffraction analyses prove those band structures are kink bands rather than commonly reported twins in beta alloys with high niobium. The kink bands are classified into three categories since the intragranular misorientation axis analyses reveal that three lattice rotation axes (Taylor axes) exist among the kink bands. The three Taylor axes are [110], [541], [121] and the corresponding three slip mode of the dislocation kink model are (112)[111], (123)[111], (101)[111] respectively. It is demonstrated that the selection of the slip mode in a kink bands is dominated by the loading axis. A slip system would have the priority to be selected as the slip mode of the kink deformation if the loading axis is close to the normal direction of the slip plane and the perpendicular direction of the slip direction.%Ti-35V-15Cr-0.3Si-0.1C alloy; High strain rate; Kink band; Taylor axis
机译：在5×10〜3s〜（-1）变形的Ti-35V-15Cr-0.3Si-0.1Cβ钛合金中不常见扭结变形。带状结构已在变形样品上形成。电子背散射衍射分析证明，这些能带结构是扭结带，而不是通常报道的高铌β合金中的孪晶。扭结带可分为三类，因为晶内取向差轴分析显示扭结带中存在三个晶格旋转轴（泰勒轴）。三个泰勒轴分别为[110]，[541]，[121]，位错扭结模型的相应三个滑移模式分别为（112）[111]，（123）[111]，（101）[111]。结果表明，在扭结带中滑模的选择受加载轴支配。如果载荷轴靠近滑移面的法线方向和滑移方向的垂直方向，则应优先选择滑移系统作为扭折变形的滑移模式。％Ti-35V-15Cr-0.3Si -0.1C合金;高应变率扭结带;泰勒轴

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  • 来源
    《Materials Science and Engineering》 |2017年第15期|218-224|共7页
  • 作者

    Youping Zheng; Weidong Zeng; Yubo Wang; Saifei Zhang;

  • 作者单位

    State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, PR China;

    State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, PR China;

    State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, PR China;

    State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, PR China;

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  • 关键词

    Ti-35V-15Cr-0.3Si-0.1C alloy; High strain rate; Kink band; Taylor axis;

    机译：Ti-35V-15Cr-0.3Si-0.1C合金;高应变率扭结带;泰勒轴;

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