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首页> 外文期刊>Materials Science and Engineering >Effect of Mn element on microstructure and mechanical properties of bulk nanocrystalline Fe_3Al based materials prepared by aluminothermic reaction
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Effect of Mn element on microstructure and mechanical properties of bulk nanocrystalline Fe_3Al based materials prepared by aluminothermic reaction

机译：锰元素对铝热反应法制备纳米晶Fe_3Al基纳米材料的微观结构和力学性能的影响

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摘要

Bulk nanocrystalline Fe_3Al based materials containing 5,10 and 15 wt.% Mn element were prepared by aluminothermic reaction. The materials were analyzed by X-ray diffraction (XRD), transmission electron microscope (TEM) and electron probe microanalyzer (EPMA). Compressive behavior and hardness of the materials were investigated. It shows that all of the three materials consist of nanocrystalline matrix and a little contamination phases. The nanocrystalline matrix phases are solid solutions composed of Fe, Al and Mn elements. The nanocrystalline matrix phases of the materials containing 5 and 10 wt.% Mn have disordered solid solution of bcc crystal structure and that of the material containing 15 wt.% Mn has ordered DO_3 crystal structure. Average grain size of the nanocrystalline matrix phases dramatically decreases at first and then increases a little with content of Mn and that of the material containing 10 wt.% Mn is the smallest. The material containing 10 wt.% Mn does not fracture in the compression and exhibits good plasticity, the yield strength and hardness increases at first and then decreases with content of Mn and those of the material containing 10 wt.% Mn are the highest.
机译：通过铝热反应制备含有5,10和15重量％的Mn元素的块状纳米晶Fe_3Al基材料。通过X射线衍射（XRD），透射电子显微镜（TEM）和电子探针显微分析仪（EPMA）对材料进行分析。研究了材料的压缩行为和硬度。结果表明，这三种材料均由纳米晶基质和少量污染相组成。纳米晶基质相是由Fe，Al和Mn元素组成的固溶体。含有5重量％和10重量％的Mn的材料的纳米晶基质相具有无序的bcc晶体结构固溶体，而含有15重量％的Mn的材料的纳米晶相具有有序的DO_3晶体结构。纳米晶基质相的平均晶粒尺寸起初急剧减小，然后随着Mn含量的增加而略有增加，并且含有10wt。％Mn的材料的平均晶粒尺寸最小。含有10重量％的Mn的材料在压缩时不会破裂，并且表现出良好的可塑性，屈服强度和硬度首先随着Mn的含量而增加，然后降低，并且含有10重量％的Mn的材料的屈服强度和硬度最高。

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  • 来源
    《Materials Science and Engineering》 |2010年第9期|2313-2319|共7页
  • 作者

    Peiqing La; Yupeng Wei; Ruijiao Lv; Yang Zhao; Yang Yang;

  • 作者单位

    State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, PR China;

    State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, PR China;

    State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, PR China;

    State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, PR China;

    State Key Laboratory of Gansu Advanced Non-ferrous Metal Materials, Lanzhou University of Technology, Lanzhou 730050, PR China;

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  • 正文语种 eng
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  • 关键词

    Fe_3Al; aluminothermic reaction; mn element; nanocrystalline; yield strength;

    机译：Fe_3Al;铝热反应;mn元素;纳米晶屈服强度;

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