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首页> 外文期刊>Journal of Nuclear Materials: Materials Aspects of Fission and Fusion >Impact of microstructural properties on hardness of tungsten heavy alloy evaluated by stand-off LIBS after PSI plasma irradiation
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Impact of microstructural properties on hardness of tungsten heavy alloy evaluated by stand-off LIBS after PSI plasma irradiation

机译：PSI等离子体照射后立管评价微观结构性能对钨重的影响

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摘要

The key issue in tokamak is change of physical properties of plasma facing materials, such as tungsten due to extreme conditions and long pulse operation. Practically, it is difficult to analyze hardness changes online through conventional methods. Hence, an online monitoring technique is much desired which measures hardness changes in fusion devices. In this study, laser induced breakdown spectroscopy (LIBS) is used as in-situ monitoring tool to measure hardness of tungsten heavy alloy (97W-2Ni-1Fe) samples after exposure to different irradiation of plasma ranging from 0.108 to 1.00 MW/m(2). The exposure of PSI plasma beam is a key factor which give rise to pronounced change in crystallographic estimation, microstructural properties and surface hardness. The X-ray diffraction study revealed modification in the structure caused, by variation in the peak intensity, crystal size, dislocation line density and microstrains upon plasma irradiation. The change in crystallographic measurements and surface hardness are well correlated with irradiated PSI power densities. Moreover, the hardness influence on LIBS intensity of tungsten heavy alloy (WHA) was carried out. The LIBS calibration curves were formed by utilizing the ratio of ionic to atomic line intensities of tungsten versus the Vickers hardness. The ratio of ionic to atomic spectral emission line intensity and plasma electron temperature (T-e), significantly increases with hardness. The obtained Pearson correlation coefficient (R-2) values (in case of calibration curve and plasma temperature) in measuring hardness of all investigated samples have good approximation which indicate the preciseness of LIBS approach. The achieved results in the present study by in-situ LIBS system confirmed its potential ability to estimate the hardness of WHA more efficient than other conventional method. (C) 2020 Elsevier B.V. All rights reserved.
机译：Tokamak中的关键问题是等离子体面向材料的物理性质的变化，例如由于极端条件和长脉冲操作，例如钨。实际上，通过传统方法难以分析硬度在线在线改变。因此，需要在线监测技术，其中衡量融合设备的硬度变化。在该研究中，激光诱导的击穿光谱（LIB）用作原位监测工具，以测量钨重合金（97W-2NI-1FE）样品的硬度暴露于暴露于0.108至1.00 mW / m（ 2）。 PSI等离子体束的曝光是一种关键因素，其产生晶体估计，微观结构性能和表面硬度的明显变化。 X射线衍射研究揭示了在等离子体照射时峰强度，晶体尺寸，位错线密度和微威尔的变化引起的结构中的修饰。晶体测量和表面硬度的变化与照射的PSI功率密度良好。此外，进行了对钨重合金（WHA）的LIBS强度的硬度影响。通过利用离子与钨的原子线强度与维氏硬度的比例来形成LIB校准曲线。离子与原子光谱排放线强度和等离子体电子温度（T-e）的比率显着增加了硬度。在测量所有研究样品的硬度时，所获得的Pearson相关系数（R-2）值（在校准曲线和等离子体温度）具有良好的近似，表明Libs方法的精确性。通过原位LIBS系统在本研究中实现的结果证实了其估计比其他常规方法更有效的硬度的潜在能力。 （c）2020 Elsevier B.v.保留所有权利。

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    Sattar Harse; Shi Jielin; Ran Hai; Imran Muhammad; Ding Wu; Das Gupta Pinaki; Ding Hongbin;

  • 作者单位

    Dalian Univ Technol Sch Phys Chinese Minist Educ Key Lab Mat Modificat Laser Ion &

    Electron Beams Dalian 116024 Peoples R China;

    Dalian Univ Technol Sch Phys Chinese Minist Educ Key Lab Mat Modificat Laser Ion &

    Electron Beams Dalian 116024 Peoples R China;

    Dalian Univ Technol Sch Phys Chinese Minist Educ Key Lab Mat Modificat Laser Ion &

    Electron Beams Dalian 116024 Peoples R China;

    Dalian Univ Technol Sch Phys Chinese Minist Educ Key Lab Mat Modificat Laser Ion &

    Electron Beams Dalian 116024 Peoples R China;

    Dalian Univ Technol Sch Phys Chinese Minist Educ Key Lab Mat Modificat Laser Ion &

    Electron Beams Dalian 116024 Peoples R China;

    Dalian Univ Technol Sch Phys Chinese Minist Educ Key Lab Mat Modificat Laser Ion &

    Electron Beams Dalian 116024 Peoples R China;

    Dalian Univ Technol Sch Phys Chinese Minist Educ Key Lab Mat Modificat Laser Ion &

    Electron Beams Dalian 116024 Peoples R China;

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  • 正文语种 eng
  • 中图分类 原子能技术;
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