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説明:

We have improved an electron stimulated desorption (ESD) apparatus to obtain the time evolution of hydrogen permeation for cold-worked stainless steel. Hydrogen permeation through grain structures was visualized by using the operando hydrogen microscope combining ESD and hydrogen supply system. The diffusion coefficients in grains were calculated from time evolution curves of hydrogen permeation. Principal component analysis (PCA) of hydrogen maps was used to classify crystal grains by the degrees of hydrogen diffusion and permeation flux. Grain structures such as the ratio of austenite/martensite, crystallographic orientations and coherent/random grain boundaries were determined by electron backscatter diffraction (EBSD) analysis. The areas with high-speed and high flux permeation of hydrogen were characterized as smaller austenitic grains with grain boundaries. The usefulness of a combined ESD-PCA-EBSD analysis on hydrogen permeation in materials was demonstrated in the present study.

権利情報:

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

キーワード: Hydrogen permeation, Hydrogen visualization, Hydrogen microscope

刊行年月日: 2020-05-27

出版者: Elsevier BV

掲載誌:

• APPLIED SURFACE SCIENCE (ISSN: 01694332) vol. 527 146710

研究助成金:

• JSPS 18H03849

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5354

公開URL: https://doi.org/10.1016/j.apsusc.2020.146710

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更新時刻: 2025-03-04 16:30:31 +0900

MDRでの公開時刻: 2025-03-04 16:30:31 +0900