Hydrogen distribution of hydrogen-charged nickel analyzed via hardness test and secondary ion mass spectrometry

Junichiro Yamabe, Kentaro Wada, Tohru Awane, Hisao Matsunaga

Research output: Contribution to journalArticle

Abstract

The hydrogen compatibility of metallic materials is often evaluated by conducting tensile tests of H-charged specimens in air or inert gas at ambient temperature; however, it is not clear whether the H distribution calculated with hydrogen diffusivity under a diffusion-controlled process is consistent with the actual distribution. This study estimated the hydrogen distribution in a H-charged nickel maintained in air at ambient temperature for a few months after exposure to hydrogen gas by using the Vickers hardness test and secondary ion mass spectrometry. Both methods provided similar H distributions, which were fitted by the solution of a diffusion equation under a diffusion-controlled process, and the hydrogen diffusivity was also determined. The estimated H distributions were successfully fitted by the solution of the diffusion equation, and the determined hydrogen diffusivity of nickel was consistent with literature data, indicating that the calculated H distribution reproduced the actual one.

Original languageEnglish
Pages (from-to)9188-9199
Number of pages12
JournalInternational Journal of Hydrogen Energy
Volume45
Issue number15
DOIs
Publication statusPublished - Mar 18 2020

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All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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