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Precipitates formed during the hot rolling process of the 1050 Al-1 mass% Mn alloy were quantitatively characterized by three-dimensional (3D) analysis. The 3D image was reconstructed using a serial sectioning technique that combined a focused ion beam and scanning electron microscopy. In the reconstructed 3D volume, 11186 precipitates were identified, and the size distribution was well explained by a log-normal distribution. In addition, we evaluated the precipitates observed in a two-dimensional (2D) SEM image extracted from the 3D volume and by scanning transmission electron microscopy observation of a specimen fabricated from the serially sectioned sample, enabling observation of the same region. Based on the data obtained from the 2D and 3D images, the average precipitate size measured from the 2D images was much smaller than that measured from the 3D images. This difference is attributed to the morphological anisotropy caused by hot rolling. Furthermore, we examined the effect of the number of analyzed precipitates on the average size and distribution. The average size depended significantly on the number of analyzed precipitates, indicating that a minimum number of precipitates is required for quantitative analysis. Moreover, we statistically evaluated the normality of the logarithmic size distribution using a quantile–quantile plot.

権利情報:

• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

キーワード: quantitative analysis, precipitate, serial-sectioning, FIB-SEM, Al–Mn alloy

刊行年月日: 2026-09-01

出版者: The Japan Institute of Metals and Materials

掲載誌:

• MATERIALS TRANSACTIONS (ISSN: 13459678) vol. 67 issue. 9 MT-L2026006

研究助成金:

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.2320/matertrans.mt-l2026006

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更新時刻: 2026-09-17 13:34:20 +0900

MDRでの公開時刻: 2026-09-17 16:28:25 +0900