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Effect of yttrium addition on the hot deformation behavior of Fe-6.5 wt% Si alloy

机译：钇加入对Fe-6.5wt％Si合金的热变形行为的影响

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摘要

Due to its remarkable soft magnetic properties, the Fe-6.5 wt%Si alloy has shown potential in energy-saving and noise-reducing applications. However, the appearance of brittle-ordered structures hinders its production and utilization. It has been previously indicated that rare earth (RE) elements can be used as inclusion modificators as well as for purification of molten steel and microalloying. In the present work, the effects of yttrium (Y) on the hot deformation of the Fe-6.5 wt%Si alloy was studied by hot compression at temperatures of 600-900 °C at different strain rates. Moreover, the processing maps were established according to the dynamic materials models (DMM), which determined the range of optimal process conditions. The obtained results demonstrated that in the range of 600-900 °C, the activation energy for hot deformation of the Fe-6.5 wt%Si alloy was 428.68 kJ/mol, which is lower than that of the alloy containing 0.03 wt%Y (473.27 kJ/mol). It is speculated that Y decreases the unstable region and apparently reduces the occurrence of microcracks during the hot deformation process of the Fe-6.5 wt%Si alloy. In addition, the presence of this element leads to an increase in the dislocation density and causes segmentation of the ordered domain. Lastly, the addition of Y improves the ductility of the Fe-6.5 wt%Si alloy due to grain refinement and reduction of the ordered domain size.
机译：由于其具有显着的软磁特性，Fe-6.5wt％Si合金示出了节能和降噪应用的潜力。然而，脆性有序结构的外观阻碍了其生产和利用。先前已经表明，稀土（RE）元件可用作包含修饰器，以及钢水和微合金化的净化。在本作工作中，通过在不同应变率的温度下，通过热压缩研究了钇（Y）对Fe-6.5wt％Si合金的热变形的影响，以600-900℃的温度。此外，根据动态材料模型（DMM）建立处理地图，其确定了最佳过程条件的范围。所得结果证明，在600-900℃的范围内，Fe-6.5wt％Si合金的热变形的活化能量为428.68kJ / mol，低于含有0.03wt％Y的合金（ 473.27 kj / mol）。推测Y降低不稳定区域，并且显然在Fe-6.5wt％Si合金的热变形过程中显然降低了微裂纹的发生。另外，该元素的存在导致位错密度的增加，并导致有序结构域的分割。最后，由于晶粒细化和有序域尺寸的减少，添加Y的添加改善了Fe-6.5wt％Si合金的延展性。

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  • 来源
    《Materials Science and Engineering》 |2020年第21期|140238.1-140238.12|共12页
  • 作者

    Defu Liu; Jing Qin; Yinghui Zhang; Zhigang Wang; Jincheng Nie;

  • 作者单位

    School of Materials Science and Engineering Jiangxi University of Science and Technology Ganzhou 341000 China;

    School of Materials Science and Engineering Jiangxi University of Science and Technology Ganzhou 341000 China;

    School of Materials Science and Engineering Jiangxi University of Science and Technology Ganzhou 341000 China;

    School of Materials Science and Engineering Jiangxi University of Science and Technology Ganzhou 341000 China;

    School of Materials Science and Engineering Jiangxi University of Science and Technology Ganzhou 341000 China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Yttrium; Fe-6.5 wtSi alloy; Hot deformation; Dislocation density; Ordered domain; Grain refinement;

    机译：钇;Fe-6.5 Wt％Si合金;热变形;脱臼密度;订购域;谷物细化;

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