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首页> 外文期刊>Journal of Materials Research >Importance of dislocation pile-ups on the mechanical properties and the Bauschinger effect in microcantilevers
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Importance of dislocation pile-ups on the mechanical properties and the Bauschinger effect in microcantilevers

机译：位错堆积对微悬臂梁力学性能和鲍辛格效应的重要性

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摘要

Copper microcantilevers were produced by focused ion beam milling and tested in situ using a scanning electron microscope. To provide different interfaces for piling up dislocations, cantilevers were fabricated to be single crystalline, bicrystalline, or single crystalline with a slit in the region of the neutral axis. The aim of the experiment was to study the influence of dislocation pile-ups on (ⅰ) strength and (ⅱ) Bauschinger effects in micrometer-sized, focused ion beam milled bending cantilevers. The samples were loaded monotonically for several times under displacement control. Even though the cantilevers exhibited the same nominal strain gradient the strength varied by 34% within the three cantilever geometries. The Bauschinger effect can be promoted and prohibited by the insertion of different interfaces.
机译：铜微悬臂梁通过聚焦离子束研磨生产，并使用扫描电子显微镜进行原位测试。为了提供用于堆积位错的不同界面，将悬臂制造为单晶，双晶或单晶，在中性轴区域内有缝隙。实验的目的是研究微米级聚焦离子束铣削弯曲悬臂中位错堆积对（ⅰ）强度和（ⅱ）Bauschinger效应的影响。在位移控制下，将样品单调加载几次。即使悬臂表现出相同的标称应变梯度，在三个悬臂几何形状内，强度也会变化34％。可以通过插入不同的界面来促进和禁止包辛格效应。

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  • 来源
    《Journal of Materials Research》 |2015年第6期|791-797|共7页
  • 作者

    M.W. Kapp; C. Kirchlechner; R. Pippan; G. Dehm;

  • 作者单位

    Montanuniversitaet Leoben, Department Materialphysik, Leoben 8700, Austria and Erich Schmidt Institute of Material Science, Austrian Academy of Sciences, Leoben 8700, Austria;

    Max-Planck-Institut fuer Eisenforschung, Duesseldorf 40237, Germany and Montanuniversitaet Leoben, Department Materialphysik, Leoben 8700, Austria;

    Erich Schmid Institute of Material Science, Austrian Academy of Sciences, Leoben 8700, Austria;

    Max-Planck-Institut fuer Eisenforschung, Duesseldorf 40237, Germany Montanuniversitaet Leoben, Department Materialphysik, Leoben 8700, Austria and Erich Schmid Institute of Material Science, Austrian Academy of Sciences, Leoben 8700, Austria;

  • 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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