Phase transformations and microstructure evolutions during depressurization of hydrogenated Fe–Mn–Si–Cr alloy

Rama Srinivas Varanasi, Motomichi Koyama, Hiroyuki Saitoh, Reina Utsumi, Toyoto Sato, Shin ichi Orimo, Eiji Akiyama

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Hydride formation and associated phase transformations have been extensively studied in pure Fe. However, the understanding of hydrogenation in Fe-based alloy systems is still lacking. Such an investigation is particularly important in the case of austenitic (face-centered cubic) steels given that hydrogen has been reported to alter the austenite phase stability. In the current work, we investigate the phase transformations associated with depressurization of non-hydrogenated and hydrogenated Fe–Mn–Si–Cr alloy (FMS) (Fe-28.84Mn-7.04Cr-6.14Si, in mass %) using in-situ x-ray diffraction technique. Additionally, we study the change in microstructure using electron backscatter diffraction (EBSD) and electron channeling contrast imagining (ECCI).

Original languageEnglish
Pages (from-to)10081-10088
Number of pages8
JournalInternational Journal of Hydrogen Energy
Volume48
Issue number27
DOIs
Publication statusPublished - 2023 Mar 29

Keywords

  • Epsilon martensite
  • High pressure
  • Hydride
  • Phase transformation
  • Synchrotron radiation X-ray diffraction

ASJC Scopus subject areas

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

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