| タイトル |
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Simultaneous Broadening Analysis of Multiple Bragg Edges Observed by Wavelength-resolved Neutron Transmission Imaging of Deformed Low-carbon Ferritic Steel
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| 作成者 |
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| アクセス権 |
metadata only access |
| 主題 |
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Other
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pulsed neutron transmission imaging
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Other
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multiple Bragg-edges broadening analysis
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corrected classical Williamson-Hall method
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micro-strain
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dislocation density
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Other
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crystallite size
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NDC
530
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| 内容注記 |
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Abstract
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With the goal of real-space mapping of dislocation information using a wavelength-resolved (spectroscopic) neutron transmission imaging method, broadenings of multiple Bragg-edges in neutron transmission spectrum were investigated in detail for the first time. Data of time-of-flight (TOF) neutron transmission imaging and diffraction experiments on a polycrystalline low-carbon ferritic steel sample while undergoing tensile testing were analysed. The Bragg-edge neutron transmission spectroscopy was combined with the classical Williamson-Hall method corrected by the crystal elastic anisotropy using the ratio of diffraction Young's modulus, namely, the corrected classical Williamson-Hall (ccWH) method. As a result, the broadening values evaluated from the ccWH analysis of Bragg-edge data were consistent with results of both our TOF neutron diffraction experiments and previous reports. In addition, it was deduced that the line-broadenings appearing in the plastic deformation condition during tensile testing in our experiment were mainly caused by micro-strain (dislocation density) effect and not by crystallite size effect. Finally, a Bragg-edge broadening mapping method, using a simultaneous multiple Bragg-edges profile analysis based on the ccWH method, could identify plastically deformed zones in the sample more clearly than a traditional single Bragg-edge broadening analysis method.
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| 出版者 |
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一般社団法人 日本鉄鋼協会 (The Iron and Steel Institute of Japan)
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| 日付 |
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| 言語 |
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| 資源タイプ |
journal article |
| 出版タイプ |
NA |
| 資源識別子 |
HDL
http://hdl.handle.net/2115/79906
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| 関連 |
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isIdenticalTo
DOI
https://doi.org/10.2355/isijinternational.ISIJINT-2019-656
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| 収録誌情報 |
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ISIJ international
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巻60
号6
開始ページ1254
終了ページ1263
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| コンテンツ更新日時 |
2023-07-26 |
