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使用紧凑型中子源进行内部纹理测量。

In-house texture measurement using a compact neutron source.

作者信息

Xu Pingguang, Ikeda Yoshimasa, Hakoyama Tomoyuki, Takamura Masato, Otake Yoshie, Suzuki Hiroshi

机构信息

Materials Sciences Research Center, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai, Ibaraki 319-1195, Japan.

Center for Advanced Photonics, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.

出版信息

J Appl Crystallogr. 2020 Mar 25;53(Pt 2):444-454. doi: 10.1107/S1600576720002551. eCollection 2020 Apr 1.

DOI:10.1107/S1600576720002551
PMID:32280321
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7133061/
Abstract

In order to improve the instrumental accessibility of neutron diffraction techniques, many emerging compact neutron sources and in-house neutron diffractometers are being developed, even though the precision level of neutron diffraction experiments performed on such instruments was thought to be incomparable with that of large-scale neutron facilities. As a challenging project, the RIKEN accelerator-driven compact neutron source (RANS) was employed here to establish the technical environment for texture measurements, and the recalculated pole figures and orientation distribution functions of an interstitial-free steel sheet obtained from RANS were compared with the results from another two neutron diffractometers well established for texture measurement. These quantitative comparisons revealed that the precise neutron diffraction texture measurement at RANS has been realized successfully, and the fine region division of the neutron detector panel is invaluable for improving the stereographic resolution of texture measurements. Moreover, through selectively using the parts of the obtained neutron diffraction patterns that exhibit good statistics, the Rietveld texture analysis improves the reliability of the texture measurement to a certain extent. These technical research results may accelerate the development of other easily accessible techniques for evaluation of engineering materials using compact neutron sources, and also help to improve the data-collection efficiency for various time-resolved scattering experiments at large-scale neutron facilities.

摘要

为了提高中子衍射技术的仪器可及性，许多新型紧凑型中子源和实验室内部中子衍射仪正在研发中，尽管在此类仪器上进行的中子衍射实验的精度水平曾被认为无法与大型中子设施相比。作为一个具有挑战性的项目，这里采用了日本理化学研究所的加速器驱动紧凑型中子源（RANS）来建立织构测量的技术环境，并将从RANS获得的无间隙钢板的重新计算极图和取向分布函数与另外两台在织构测量方面成熟的中子衍射仪的结果进行比较。这些定量比较表明，在RANS上已成功实现精确的中子衍射织构测量，并且中子探测器面板的精细区域划分对于提高织构测量的极射赤面投影分辨率非常重要。此外，通过有选择地使用所获得的具有良好统计性的中子衍射图样部分，Rietveld织构分析在一定程度上提高了织构测量的可靠性。这些技术研究结果可能会加速其他利用紧凑型中子源评估工程材料的易于获取技术的发展，也有助于提高大型中子设施各种时间分辨散射实验的数据收集效率。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e314/7133061/f396034c2fc8/j-53-00444-fig8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e314/7133061/d313882f9c1a/j-53-00444-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e314/7133061/22de51c95139/j-53-00444-fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e314/7133061/90c46cdb56e5/j-53-00444-fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e314/7133061/60df75678ee7/j-53-00444-fig4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e314/7133061/c3d87ebd586d/j-53-00444-fig5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e314/7133061/19bc041d2c96/j-53-00444-fig6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e314/7133061/770a5eba99ac/j-53-00444-fig7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e314/7133061/f396034c2fc8/j-53-00444-fig8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e314/7133061/d313882f9c1a/j-53-00444-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e314/7133061/22de51c95139/j-53-00444-fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e314/7133061/90c46cdb56e5/j-53-00444-fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e314/7133061/60df75678ee7/j-53-00444-fig4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e314/7133061/c3d87ebd586d/j-53-00444-fig5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e314/7133061/19bc041d2c96/j-53-00444-fig6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e314/7133061/770a5eba99ac/j-53-00444-fig7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e314/7133061/f396034c2fc8/j-53-00444-fig8.jpg

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本文引用的文献

1
High stereographic resolution texture and residual stress evaluation using time-of-flight neutron diffraction.使用飞行时间中子衍射进行高立体分辨率织构和残余应力评估。
J Appl Crystallogr. 2018 May 9;51(Pt 3):746-760. doi: 10.1107/S1600576718004004. eCollection 2018 Jun 1.
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Shielding design of a target station and radiation dose level investigation of proton linac for a compact accelerator-driven neutron source applied at industrial sites.用于工业场所的紧凑型加速器驱动中子源的靶站屏蔽设计及质子直线加速器辐射剂量水平研究
Appl Radiat Isot. 2018 Jul;137:129-138. doi: 10.1016/j.apradiso.2018.03.015. Epub 2018 Mar 20.
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A furnace with rotating load frame for in situ high temperature deformation and creep experiments in a neutron diffraction beam line.
一种带有旋转负载框架的熔炉，用于在中子衍射束线中进行原位高温变形和蠕变实验。
Rev Sci Instrum. 2012 May;83(5):053901. doi: 10.1063/1.4708619.
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A versatile automated sample changer for texture measurements on the high pressure-preferred orientation neutron diffractometer.一种用于高压择优取向中子衍射仪上进行织构测量的多功能自动样品更换器。
Rev Sci Instrum. 2010 Sep;81(9):093302. doi: 10.1063/1.3485035.