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Atomistic simulation of the strain-hardening behavior of bicrystal Cu nanowires

机译：双晶铜纳米线应变硬化行为的原子模拟

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摘要

To determine whether plastic-hardening behavior occurs in metal nanowires, an atomistic simulation was performed to investigate the tension process in a bicrystal Cu nanowire. The results indicate that bicrystal Cu nanowires exhibit strain-hardening behavior, unlike their single-crystal counterparts. The strain-hardening behavior is related to the orientation of two crystal grains, and the number of atoms determines whether strain-hardening behavior occurs in the asymmetrically tilted bicrystal Cu nanowires. Strain hardening occurs in almost bicrystal Cu nanowires with different orientation angles. The initial yield stress is determined by the grain whose orientation angle is closer to 45° among the two crystal grains, resulting in a high value of the tilting tendency factor, and thus making it easier to generate slip.
机译：为了确定金属纳米线中是否发生塑性硬化行为，进行了原子模拟，以研究双晶铜纳米线中的拉伸过程。结果表明，与单晶铜纳米线不同，双晶铜纳米线表现出应变硬化行为。应变硬化行为与两个晶粒的取向有关，原子数决定了在不对称倾斜的双晶Cu纳米线中是否发生应变硬化行为。应变硬化发生在具有不同取向角的几乎双晶铜纳米线中。初始屈服应力由两个晶粒中取向角更接近45°的晶粒确定，从而导致倾斜趋势因子的值较高，因此更易于产生滑动。

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  • 来源
    《Journal of Materials Research》 |2013年第24期|3339-3346|共8页
  • 作者

    Lin Yuan; Debin Shan; Zhenhai Xu; Lumeng Wang; Bin Guo;

  • 作者单位

    Department of Materials Engineering, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;

    Department of Materials Engineering, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;

    Department of Materials Engineering, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;

    Department of Materials Engineering, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;

    Department of Materials Engineering, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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