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Alternative title: Proposal of diffusion model obtained from time-resolved hydrogen permeation measurement with operand hydrogen microscopes

Description:

One of the biggest issues in the hydrogen economy is “hydrogen embrittlement” of metal induced by hydrogen entering and diffusing into the material. Hydrogen diffusion in metallic materials is difficult to grasp owing to the non-uniform compositions and structures of metal. Here a time-resolved “operando hydrogen microscope” was used to interpret local diffusion behavior of hydrogen in the microstructure of a stainless steel with austenite and martensite structures. The martensite/austenite ratios differed in each local region of the sample. The path of hydrogen permeation was inferred from the time evolution of hydrogen permeation in several regions. We proposed a model of hydrogen diffusion in a dual-structure material and verified the validity of the model by simulations.

Rights:

• Creative Commons BY-NC Attribution-NonCommercial 4.0 International
  

Keyword: hydrogen visualization, hydrogen permeation, diffusion model, stainless steel

Date published: 2021-12-10

Publisher: Surface Science Society Japan

Journal:

• Vacuum and Surface Science (ISSN: 24335835) vol. 64 issue. 12 p. 568-574

Funding:

• JSPS 18H03849

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1380/vss.64.568

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Updated at: 2024-01-05 22:13:20 +0900

Published on MDR: 2023-12-28 16:30:13 +0900