Fast neutron surface strain scanning with high spatial resolution

Fast neutron surface strain scanning with high spatial resolution
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具有高空间分辨率的快速中子表面应变扫描

DOI:
10.1016/j.matchar.2019.05.031
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发表时间:
2019
影响因子:
4.7
通讯作者:
J. Šaroun
J. Šaroun
中科院分区:
材料科学1区
文献类型:
--
作者:
J. Rebelo Kornmeier;M. Hofmann;V. Luzin;J. Gibmeier;J. Šaroun

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本文介绍了一种用中子衍射法进行大规体积近表面应变扫描测量的方法。该方法校正与部分照明的计量体积相关的伪(假)应变,并使大计量体积测量值能够反卷积为假定的真实的轮廓。它被验证对X射线和中子衍射实验具有非常高的空间分辨率。分析结果表明,中子衍射应变测量与标准(或大)尺寸的标准体积是可能的,以重现真实的应变分布的人工影响有关的部分照明。与具有较小计量体积的测量相比,可以实现高达15倍的计数时间增益,而不会明显损失空间分辨率。
A method for near-surface strain scanning measurements using neutron diffraction with large gauge volumes is described. The approach corrects for pseudo (spurious) strains related to partially illuminated gauge volumes and enables deconvolution of the large gauge volume measurements into the assumed real profile. It was validated against X-ray and neutron diffraction experiments with very high spatial resolution. The analysis of the results shows that neutron diffraction based strain measurements with standard (or large) sized gauge volumes are possible to reproduce the real strain profile free of artificial effects related to partial illumination. Compared to measurements with smaller gauge volumes gains in counting time of up to a factor of fifteen can be achieved without appreciable loss in spatial resolution.
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