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Torsional stress relaxation behavior of microscale copper wire

机译：微型铜线的扭转应力松弛行为

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摘要

Torsional stress relaxation behavior of copper wire with a diameter of 50 μm and grain size of 3.7 μm is experimentally investigated at room temperature. It is revealed that the stress relaxation occurs in both elastic and plastic regions. An elevated stress drop and a reduced apparent activation volume with increasing initial stress levels are also found in both elastic and plastic regions. Extremums of stress drop and activation volume are observed around the elastic limit. Meanwhile, high strain rate and rapidly exhaustive mobile dislocation density are observed. Finally, the cross-slip is considered to be the operating mechanism.
机译：在室温下通过实验研究了直径为50μm，晶粒尺寸为3.7μm的铜线的扭转应力松弛行为。结果表明，应力松弛发生在弹性和塑性区域。在弹性和塑性区域中，都发现随着初始应力水平的增加，应力下降升高，表观活化体积降低。在弹性极限附近观察到应力降和活化体积的极值。同时，观察到高应变率和快速穷举的移动位错密度。最后，交叉滑移被认为是操作机制。

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  • 来源
    《Materials Science and Engineering》 |2017年第20期|277-281|共5页
  • 作者

    Song Guo; Yuming He; Dabiao Liu; Jian Lei; Zhenkun Li; Huaming Ding;

  • 作者单位

    Department of Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China;

    Department of Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China;

    Department of Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China;

    Department of Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China;

    Department of Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China;

    Department of Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Stress relaxation; Torsion; Microscale copper wires; Activation volume; Cross-slip;

    机译：压力松弛;扭转微型铜线;激活量;横滑;

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