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Phase-field simulation of dose rate effect on the Cu precipitation with neutron irradiation

机译：中子辐照Cu沉淀剂剂量率效应的相场模拟

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摘要

Radiation-enhanced precipitation (REP) of Cu in Fe-Cu alloys results in hardening and degradation of the mechanical properties. By combining the CALPHAD-based free energy for phase-field modeling, and radiation-enhanced diffusion (RED) with neutron irradiating energetic particle, the precipitation of Cu in binary Fe-Cu alloys is studied under different dose rates, concentrations, and temperatures. Rate theory (RT) provides the RED that serves as an input parameter for the phase-field simulation to capture the morphology of the precipitates. The REP results agree with the theoretical predictions: the increase in the dose rates increases the concentration of defects, and accelerates the kinetics of precipitation. The simulation predicts the stability of the precipitates even under high damage rates. The increase in radius is achieved for high damage rates. Precipitate dissolution is observed to be dependent on the combination of dose rate, concentration, and temperature. The work also outlines the limitations of the model and the potential future improvements.
机译：Fe-Cu合金中Cu的辐射强化析出（REP）导致合金的硬化和力学性能的降低。通过将基于CALPHAD的相场模拟自由能与中子辐照高能粒子的辐射增强扩散（RED）相结合，研究了不同剂量率、浓度和温度下Fe-Cu二元合金中Cu的析出。速率理论（RT）提供了红色，作为相场模拟的输入参数，以捕获沉淀的形态。REP结果与理论预测一致：剂量率的增加增加了缺陷的浓度，并加速了沉淀动力学。模拟预测了即使在高损伤率下沉淀物的稳定性。半径的增加是为了获得高损伤率。观察到沉淀溶解取决于剂量率、浓度和温度的组合。这项工作还概述了该模型的局限性和未来可能的改进。

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    Maqbool Shahid; Li Yongsheng; Muhammad Suleman; Yan Zhengwei; Shi Shujing;

  • 作者单位

    Nanjing Univ Sci &

    Technol Sch Mat Sci &

    Engn Nanjing 210094 Peoples R China;

    Nanjing Univ Sci &

    Technol Sch Mat Sci &

    Engn Nanjing 210094 Peoples R China;

    Nanjing Univ Sci &

    Technol Sch Mat Sci &

    Engn Nanjing 210094 Peoples R China;

    Nanjing Univ Sci &

    Technol Sch Mat Sci &

    Engn Nanjing 210094 Peoples R China;

    Nanjing Univ Sci &

    Technol Sch Mat Sci &

    Engn Nanjing 210094 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 物理学;化学;
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