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首页> 外文期刊>Journal of Materials Research >High strain rate in situ micropillar compression of a Zr-based metallic glass
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High strain rate in situ micropillar compression of a Zr-based metallic glass

机译：ZR基金属玻璃的高应变率原位微生物压缩

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摘要

High strain rate micromechanical testing can assist researchers in elucidating complex deformation mechanisms in advanced material systems. In this work, the interactions of atomic-scale chemistry and strain rate in affecting the deformation response of a Zr-based metallic glass was studied by varying the concentration of oxygen dissolved into the local structure. Compression of micropillars over six decades of strain rate uncovered a remarkable reversal of the strain rate sensitivity from negative to positive above ～ 5 s~(-1) due to a delocalisation of shear transformation events within the pre-yield linear regime for both samples, while a higher oxygen content was found to generally decrease the strain rate sensitivity effect. It was also identified that the shear band propagation speed increases with the actuation speed, leading to a transition in the deformation behaviour from serrated to apparent non-serrated plastic flow at ～5s~(-1).
机译：高应变率微机械测试可以帮助研究人员阐明先进材料系统中的复杂变形机制。 在这项工作中，通过改变溶解到局部结构的氧气浓度来研究原子尺度化学和应变率在影响ZR基金属玻璃的变形响应的相互作用。 由于剪切变换事件的剖视发生在两个样品的剪切变换事件的逐渐扩展，因此在六十年的应变速率上揭示了六十年的致敏感率的显着反转，其抗剪切变换事件的逐渐变换发生了显着的逆转。 虽然发现较高的氧含量通常降低应变率敏感性效果。 还识别出剪切带传播速度随致动速度而增加，导致从锯齿状的变形行为中的变形行为过渡到明显的非锯齿状塑料流动在约5s〜（-1）。

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  • 来源
    《Journal of Materials Research》 |2021年第11期|2325-2336|共12页
  • 作者

    Rajaprakash Ramachandramoorthy; Fan Yang; Daniele Casari; Moritz Stolpe; Manish Jain; Jakob Schwiedrzik; Johann Michler; Jamie J. Kruzic; James P. Best;

  • 作者单位

    Max-Planck-Institut fuer Eisenforschung GmbH Max-Planck-Strasse 1 40237 Duesseldorf Germany Laboratory for Mechanics of Materials and Nanostructures Empa - Swiss Federal Institute for Materials Science and Technology 3603 Thun Switzerland;

    Institut fuer Materialphysik im Weltraum Deutsches Zentrum fuer Luft- und Raumfahrt (DLR) 51170 Koeln Germany;

    Laboratory for Mechanics of Materials and Nanostructures Empa - Swiss Federal Institute for Materials Science and Technology 3603 Thun Switzerland;

    Heraeus Amloy Technologies GmbH Heraeusstrasse 12-14 63405 Hanau Germany;

    Laboratory for Mechanics of Materials and Nanostructures Empa - Swiss Federal Institute for Materials Science and Technology 3603 Thun Switzerland;

    Laboratory for Mechanics of Materials and Nanostructures Empa - Swiss Federal Institute for Materials Science and Technology 3603 Thun Switzerland;

    Laboratory for Mechanics of Materials and Nanostructures Empa - Swiss Federal Institute for Materials Science and Technology 3603 Thun Switzerland;

    School of Mechanical and Manufacturing Engineering University of New South Wales (UNSW Sydney) Sydney NSW 2052 Australia;

    Max-Planck-Institut fuer Eisenforschung GmbH Max-Planck-Strasse 1 40237 Duesseldorf Germany School of Mechanical and Manufacturing Engineering University of New South Wales (UNSW Sydney) Sydney NSW 2052 Australia Institut fuer Metallkunde und Materialphysik RWTH Aachen University 52056 Aachen Germany;

  • 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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