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首页> 外文期刊>Materials Science and Engineering >Synergistic damping effect mechanism of magneto-mechanical hysteresis and dislocations energy dissipation in FeMnCrCo high entropy alloys
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Synergistic damping effect mechanism of magneto-mechanical hysteresis and dislocations energy dissipation in FeMnCrCo high entropy alloys

机译：磁力机械滞后和脱位在紫色高熵合金中的磁力滞后能量耗散的协同阻尼效应机理

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摘要

The Fe_(65-x)Mn_(20)Cr_(15)CO_x (x = 0, 5,10,15) high entropy alloys (HEAs) were prepared by mechanical alloying (MA) and spark plasma sintering (SPS). The effects of the configurational entropy on the microstructure, magnetic properties, and damping behaviors were investigated in this paper. As the Co content increased, the configurational entropy of the HEAs was increased from 0.88R to 1.23R, the magnetology performance was reduced significantly, but the peak of internal friction (IF) Q~(-1) increased monotonously. The maximum internal friction (IF) Q~(-1)max achieved 0.073 when 15 at% Co element was added. With the configurational entropy increasing, in addition to the ferromagnetic damping mechanism, the dislocation damping mechanism was introduced in the HEAs. The synergistic effect of magneto-mechanical hysteresis and dislocation energy dissipation ensured the FeMnCrCo HEAs maintained high damping performance in a wide strain amplitude. Through the regulation of the microstructure, the possibility of application of the damping alloy under extreme conditions can be expanded.
机译：通过机械合金化（MA）和火花等离子体烧结（SPS）制备Fe_（65-X）Mn_（20）CR_（X = 0,5,10,15）高熵合金（SPS）。本文研究了配置熵对微观结构，磁性和阻尼行为的影响。随着CO含量的增加，HEA的配置熵从0.88R增加到1.23R，磁性表现显着降低，但内部摩擦（IF）Q〜（-1）的峰值单调增加。当加入％Co元素时，最大内部摩擦（IF）Q〜（-1）最大达到0.073。利用配置熵的增加，除了铁磁阻尼机构之外，夹具中引入了位错阻尼机构。磁力机械磁滞和位错能量耗散的协同效应确保了Femncro Hea在宽应变幅度下保持高阻尼性能。通过微观结构的调节，可以扩大在极端条件下施加阻尼合金的可能性。

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  • 来源
    《Materials Science and Engineering》 |2021年第22期|141412.1-141412.9|共9页
  • 作者

    Wanxin Wang; Qiang Chen; Ruirui Liu; Tao Luo; Peinan Du; Zhaohua Huang; Qianfu Pan; Zhihai Liao; Yi Xu;

  • 作者单位

    Key Laboratory of Advanced Technologies of Materials Ministry of Education School of Materials Science and Engineering Southwest Jiaotong University Chengdu 610031 Sichuan China;

    Key Laboratory of Advanced Technologies of Materials Ministry of Education School of Materials Science and Engineering Southwest Jiaotong University Chengdu 610031 Sichuan China;

    Science and Technology on Reactor Fuel and Materials Laboratory Nuclear Power Institute of China Chengdu 610213 China;

    Key Laboratory of Advanced Technologies of Materials Ministry of Education School of Materials Science and Engineering Southwest Jiaotong University Chengdu 610031 Sichuan China;

    Science and Technology on Reactor Fuel and Materials Laboratory Nuclear Power Institute of China Chengdu 610213 China;

    Science and Technology on Reactor Fuel and Materials Laboratory Nuclear Power Institute of China Chengdu 610213 China;

    Science and Technology on Reactor Fuel and Materials Laboratory Nuclear Power Institute of China Chengdu 610213 China;

    Science and Technology on Reactor Fuel and Materials Laboratory Nuclear Power Institute of China Chengdu 610213 China;

    Key Laboratory of Advanced Technologies of Materials Ministry of Education School of Materials Science and Engineering Southwest Jiaotong University Chengdu 610031 Sichuan China;

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  • 正文语种 eng
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  • 关键词

    High entropy alloys; Configurational entropy; Magneto-mechanical hysteresis; Dislocation energy dissipation; Synergistic effect;

    机译：高熵合金;配置熵;磁机械滞后;错位能量耗散;协同效应;

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