Hydrogen Enhances Shape Memory Effect of a Ferrous Face-Centered Cubic Alloy

Motomichi Koyama, Chunxi Hao, Eiji Akiyama, Kaneaki Tsuzaki

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


This paper marks the first report on the fact that interstitial hydrogen improves the shape recovery property of an Fe-based face-centered cubic alloy, regardless of pre-strain level. The maximum shape recovery strain when using hydrogen was increased from 2.8 to 3.4 pct at an approximately 7 pct pre-strain. The enhancement of the shape memory effect by hydrogen stems from (1) increasing deformation-induced martensite fraction, (2) thinning of martensite plates, and (3) increasing the number of martensite plates.

Original languageEnglish
Pages (from-to)4439-4441
Number of pages3
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Issue number9
Publication statusPublished - 2020 Sept 1

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys


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