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Online ISSN : 2433-5843
Print ISSN : 2433-5835
特集「X線を用いたその場観察技術の展開」
構造材料のき裂・劣化のその場観察~放射光によるX線顕微法および時分割計測法~
木村 正雄
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2021 年 64 巻 5 号 p. 206-211

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X-ray microscopy and time-resolved observation using synchrotron radiation are reviewed based on recent reports on in situ observation of cracking and degradation of structural materials. X-ray microscopy can provide three-dimensional images of microstructures and chemical states with a high spatial resolution down to 50 nm. In situ observation using X-ray microscopy successfully revealed crack initiation and propagation in carbon fiber reinforced plastic (CFRP) while a stress was applied to the specimen. X-ray microscopy was applied to ceramic coating or CFRP to perform chemical-state mapping, which is essential for understanding the trigger sites of degradation. In situ observation of time-resolved X-ray diffraction and/or X-ray absorption spectroscopy was carried out with a time resolution down to a few nanosecond by synchronizing an X-ray pulse with a laser pulse. This technique was applied to investigate the mechanism of deformation and fracture or structural phase transitions of metal and alloys after the laser shock.

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この記事はクリエイティブ・コモンズ [表示 - 非営利 4.0 国際]ライセンスの下に提供されています。
https://creativecommons.org/licenses/by-nc/4.0/deed.ja
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