Hydrogen-assisted crack propagation in α-iron during elasto-plastic fracture toughness tests

Domas Birenis, Yuhei Ogawa, Hisao Matsunaga, Osamu Takakuwa, Junichiro Yamabe, Øystein Prytz, Annett Thøgersen

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


Elasto-plastic fracture toughness tests of a commercially pure iron were performed in air and in hydrogen gas at two different pressures. Some unique characteristics of hydrogen-enhanced cracking were exhibited at both the macroscopic and microscopic length scales, based on the observation of fracture surface, fracture plane, plasticity distribution and dislocation structure. The possible mechanisms responsible for the hydrogen-induced degradation of fracture toughness are discussed.

Original languageEnglish
Pages (from-to)396-404
Number of pages9
JournalMaterials Science and Engineering: A
Publication statusPublished - May 22 2019

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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