Comparative study of hydrogen embrittlement in stable and metastable high-entropy alloys

Kenshiro Ichii, Motomichi Koyama, Cemal Cem Tasan, Kaneaki Tsuzaki

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

We investigated the effects of hydrogen on the mechanical response and embrittlement behavior of Fe20Mn20Ni20Cr20Co and Fe30Mn10Cr10Co (at.%) alloys precharged with 100 MPa hydrogen gas. These alloys can be classified as stable and metastable austenite-based high entropy alloys (HEAs), respectively. We carried out tensile tests at initial strain rates of 10−4 and 10−2 s−1 at ambient temperature. Both HEAs revealed hydrogen embrittlement associated with localized plasticity-assisted intergranular crack initiation. It is important to note that hydrogen-assisted cracking of the metastable HEA occurred via localized plasticity for both the austenite and ε-martensite phases – an unusual observation for the latter.

Original languageEnglish
Pages (from-to)74-77
Number of pages4
JournalScripta Materialia
Volume150
DOIs
Publication statusPublished - Jun 2018

Fingerprint

hydrogen embrittlement
Hydrogen embrittlement
Entropy
entropy
Hydrogen
austenite
plastic properties
Austenite
Plasticity
hydrogen
embrittlement
crack initiation
Embrittlement
tensile tests
martensite
Crack initiation
Martensite
ambient temperature
strain rate
Strain rate

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

Cite this

Comparative study of hydrogen embrittlement in stable and metastable high-entropy alloys. / Ichii, Kenshiro; Koyama, Motomichi; Tasan, Cemal Cem; Tsuzaki, Kaneaki.

In: Scripta Materialia, Vol. 150, 06.2018, p. 74-77.

Research output: Contribution to journalArticle

Ichii, Kenshiro ; Koyama, Motomichi ; Tasan, Cemal Cem ; Tsuzaki, Kaneaki. / Comparative study of hydrogen embrittlement in stable and metastable high-entropy alloys. In: Scripta Materialia. 2018 ; Vol. 150. pp. 74-77.
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