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通过样品旋转提高金属合金中各向异性析出物的小角和广角X射线散射测量的可靠性。

Improving the reliability of small- and wide-angle X-ray scattering measurements of anisotropic precipitates in metallic alloys using sample rotation.

作者信息

Perrin Thomas, Chahine Gilbert A, Arnaud Stéphan, Després Arthur, Heugue Pierre, Deschamps Alexis, De Geuser Frédéric

机构信息

SIMaP Université Grenoble Alpes, CNRS, Grenoble INP 38000Grenoble France.

Institut Néel 25 Avenue des Martyrs 38042Grenoble France.

出版信息

J Appl Crystallogr. 2024 Nov 4;57(Pt 6):1800-1814. doi: 10.1107/S1600576724009294. eCollection 2024 Dec 1.

DOI:10.1107/S1600576724009294
PMID:39628889
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11611286/
Abstract

Nanometric precipitates in metallic alloys often have highly anisotropic shapes. Given the large grain size and non-random texture typical of these alloys, performing small- and wide-angle X-ray scattering (SAXS/WAXS) measurements on such samples for determining their characteristics (typically size and volume fraction) results in highly anisotropic and irreproducible data. Rotations of flat samples during SAXS/WAXS acquisitions are presented here as a solution to these anisotropy issues. Two aluminium alloys containing anisotropic precipitates are used as examples to validate the approach with a -45°/45° angular range. Clear improvements can be seen on the SAXS () fitting and the consistency between the different SAXS/WAXS measurements. This method-ology results in more reliable measurements of the precipitate's characteristics, and thus allows for time- and space-resolved measurements with higher accuracy.

摘要

金属合金中的纳米级析出物通常具有高度各向异性的形状。鉴于这些合金典型的大晶粒尺寸和非随机织构，对这类样品进行小角和广角X射线散射（SAXS/WAXS）测量以确定其特征（通常是尺寸和体积分数）会得到高度各向异性且不可重复的数据。本文提出在SAXS/WAXS采集过程中旋转扁平样品，作为解决这些各向异性问题的一种方法。以两种含有各向异性析出物的铝合金为例，在-45°/45°角范围内验证该方法。在SAXS（）拟合以及不同SAXS/WAXS测量之间的一致性方面可以看到明显的改进。这种方法能更可靠地测量析出物的特征，从而实现更高精度的时间和空间分辨测量。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c924/11611286/7a2c01843ec3/j-57-01800-fig5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c924/11611286/943479d6856b/j-57-01800-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c924/11611286/efdd98bb4859/j-57-01800-fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c924/11611286/47f71571c185/j-57-01800-fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c924/11611286/4395cef44ba6/j-57-01800-fig4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c924/11611286/7a2c01843ec3/j-57-01800-fig5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c924/11611286/943479d6856b/j-57-01800-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c924/11611286/efdd98bb4859/j-57-01800-fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c924/11611286/47f71571c185/j-57-01800-fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c924/11611286/4395cef44ba6/j-57-01800-fig4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/c924/11611286/7a2c01843ec3/j-57-01800-fig5.jpg

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