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首页> 外文期刊>Materials Science and Engineering >Structure and tensile properties of Fe-Cr model alloy strengthened by nano-scale NbC particles derived from controlled crystallization of Nb-rich clusters
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Structure and tensile properties of Fe-Cr model alloy strengthened by nano-scale NbC particles derived from controlled crystallization of Nb-rich clusters

机译：富Nb团簇的受控结晶得到的纳米级NbC颗粒增强了Fe-Cr模型合金的结构和拉伸性能

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摘要

This article describes the microstructural evolution and tensile properties of Fe-Cr model alloy strengthened by nano-scale NbC particles. According to the results obtained from X-ray diffraction and transmission electron microscope with Energy Dispersive Spectrometer, the bcc ultrafine grains and the disordered phase of Nb-rich nano-clusters were observed in the milled powders. The hot pressing (HP) resulted in a nearly equiaxed ferritic grains and dispersed nano-scale NbC (～8 nm) particles. The mi-crostructure studies reveal that the formation of NbC nanoparticles is composed of nucleation and growth of the Nb-rich nano-clusters involving diffusion of their component. At room temperature the material exhibits an ultimate tensile strength of 700 MPa, yield strength of 650 MPa, and total elongation of 11.7 pct. The fracture surface studies reveal that a typical ductile fracture mode has occurred during tensile test.
机译：本文描述了纳米级NbC颗粒强化的Fe-Cr模型合金的组织演变和拉伸性能。根据X射线衍射和透射电子显微镜用能量分散光谱仪获得的结果，在研磨的粉末中观察到bcc超细晶粒和富Nb纳米团簇的无序相。热压（HP）导致了几乎等轴的铁素体晶粒和分散的纳米级NbC（〜8 nm）颗粒。微观结构研究表明，NbC纳米颗粒的形成是由富Nb纳米团簇的成核和生长，涉及其组分的扩散。在室温下，材料表现出700 MPa的极限拉伸强度，650 MPa的屈服强度和11.7 pct的总伸长率。断裂表面研究表明，在拉伸试验过程中发生了典型的延性断裂模式。

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  • 来源
    《Materials Science and Engineering》 |2016年第30期|579-587|共9页
  • 作者

    Lei Dai; Qianying Guo; Yongchang Liu; Liming Yu; Huijun Li;

  • 作者单位

    College of Materials and Chemical Engineering, Three Gorges University, Yichang 443002, PR China;

    State Key Lab of Hydraulic Engineering Simulation and Safety, School of Material Science and Engineering, Tianjin University, Tianjin 300354, PR China;

    State Key Lab of Hydraulic Engineering Simulation and Safety, School of Material Science and Engineering, Tianjin University, Tianjin 300354, PR China;

    State Key Lab of Hydraulic Engineering Simulation and Safety, School of Material Science and Engineering, Tianjin University, Tianjin 300354, PR China;

    State Key Lab of Hydraulic Engineering Simulation and Safety, School of Material Science and Engineering, Tianjin University, Tianjin 300354, PR China;

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  • 正文语种 eng
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  • 关键词

    Ferritic alloy; Carbide dispersion strengthened; Mechanical milling; Hot pressing; Nano-scale particle; Microstructure; Tensile properties;

    机译：铁素体合金碳化物分散性增强;机械铣削;热压;纳米级颗粒;微观结构拉伸性能;

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