Honaramooz Mohammad Taha, Morak Roland, Pogatscher Stefan, Fritz-Popovski Gerhard, Kremmer Thomas M, Meisel Thomas C, Österreicher Johannes A, Arnoldt Aurel, Paris Oskar
Chair of Physics, Department Physics, Mechanics and Electrical Engineering, Montanuniverstät Leoben, Franz-Josef-Str. 18, 8700 Leoben, Austria.
R&D Material Science CMI, Center for Material Innovation, AMAG Rolling GmbH, Postfach 32, 5282 Ranshofen, Austria.
Materials (Basel). 2023 Jan 31;16(3):1213. doi: 10.3390/ma16031213.
The characterization of Zr-containing dispersoids in aluminum alloys is challenging due to their broad size distribution, low volume fraction, and heterogeneous distribution within the grains. In this work, small-angle X-ray scattering (SAXS) and small-angle neutron scattering (SANS) were compared to scanning electron microscopy (SEM) and transmission electron microscopy (TEM) regarding their capability to characterize Zr-containing dispersoids in aluminum alloys. It was demonstrated that both scattering techniques are suitable tools to characterize dispersoids in a multi-phase industrial 7xxx series aluminum alloy. While SAXS is more sensitive than SANS due to the high electron density of Zr-containing dispersoids, SANS has the advantage of being able to probe a much larger sample volume. The combination of both scattering techniques allows for the verification that the contribution from dispersoids can be separated from that of other precipitate phases such as the S-phase or GP-zones. The size distributions obtained from SAXS, SANS and TEM showed good agreement. The SEM-derived size distributions were, however, found to significantly deviate from those of the other techniques, which can be explained by considering the resolution-limited restrictions of the different techniques.
由于含锆弥散相在铝合金中的尺寸分布较宽、体积分数较低且在晶粒内分布不均匀，对其进行表征具有挑战性。在这项工作中，将小角X射线散射（SAXS）和小角中子散射（SANS）与扫描电子显微镜（SEM）和透射电子显微镜（TEM）在表征铝合金中含锆弥散相的能力方面进行了比较。结果表明，这两种散射技术都是表征多相工业7xxx系铝合金中弥散相的合适工具。由于含锆弥散相的电子密度高，SAXS比SANS更灵敏，而SANS的优势在于能够探测更大的样品体积。两种散射技术的结合可以验证弥散相的贡献能够与其他析出相（如S相或GP区）的贡献区分开来。从SAXS、SANS和TEM获得的尺寸分布显示出良好的一致性。然而，发现由SEM得出的尺寸分布与其他技术的尺寸分布有显著偏差，这可以通过考虑不同技术的分辨率限制来解释。
