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Significant room-temperature plasticity in a high Zr-containing bulk glassy alloy

机译：高ZR散装玻璃合金中的高型室温可塑性

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摘要

In this study, the glass forming ability, thermal stability, and room-temperature mechanical behavior of a high Zr-containing Zr_(71)Cu_(11)Ni_(10.5)Al_7Ti_(0.5)bulk glassy alloy were investigated. The glassy alloy exhibits a high glass-forming ability with a critical casting diameter of 5 mm using copper mold injection casting, and its critical cooling rate is estimated to be smaller than 40 K/s. A small kinetic fragility index m of 32 indicates its good thermodynamic stability and glass-forming ability. Compressive tests indicate that the glassy alloy displays a significant average plastic strain of 12.3%, a high fracture strength of 1592 MPa, and Young's modulus of 74.5 GPa. The good ductility is attributed to the introduction of more free volume and local compositional inhomogeneity with increasing Zr addition. This finding may provide useful guidelines for the development of novel high Zr-containing glassy alloys.
机译：在该研究中，研究了含有高Zr Zr_（71）Cu_（11）Ni_（10.5）Al_7Ti_（0.5）散装玻璃合金的高Zr Zr_（71）Cu_（11）甲基合金的玻璃形成能力，热稳定性和室温力学。玻璃合金具有高玻璃形成能力，临界铸造直径为5mm，使用铜模具注射铸造，其临界冷却速率估计小于40 k / s。 32的小动力学脆性指数M表示其良好的热力学稳定性和玻璃形成能力。压缩试验表明，玻璃合金显示出12.3％的显着平均塑性应变，高裂缝强度为1592MPa，杨氏模量为74.5GPa。良好的延展性归因于引入更多的自由体积和局部成分不均匀性，随着ZR加入增加。该发现可以为开发新型高ZR玻璃合金的开发提供有用的指导方针。

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  • 来源
    《Journal of Materials Research》 |2020年第12期|1590-1597|共8页
  • 作者

    Shuangshuang Chen; Peidi Song; Dong Xing; jiahua Zou; Xida Deng; Feng Liu;

  • 作者单位

    School of Materials Science and Engineering Anhui University ofTechnology Ma'anshan 243002 China Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials Anhui University of Technology Ministry of Education Ma'anshan 243002 China;

    School of Materials Science and Engineering Anhui University of Technology Ma'anshan 243002 China;

    School of Materials Science and Engineering Anhui University of Technology Ma'anshan 243002 China;

    School of Management Science and Engineering Anhui University of Technology Ma'anshan 243002 China;

    College of Materials Science and Engineering Shenzhen University Shenzhen 518060 China;

    State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi'an 710072 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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