Fracture-toughness estimation from small-punch test in hydrogen exhibiting ductile and ductile–brittle fracture modes

Jin Ha Hwang, Ki Wan Seo, Yun Jae Kim, Ki Seok Kim

Research output: Contribution to journalArticlepeer-review

Abstract

In this study, an energy-based fracture toughness estimation method based on a small-punch test in a hydrogen environment, exhibiting either ductile or combined ductile and brittle fracture modes is proposed. For the ductile fracture mode, the energy term due to gas pressure in the small-punch test in hydrogen environment is simply added to the existing energy-based fracture toughness estimation equation. For the combined ductile and fracture mode, modified equations for the plastic energy term are proposed to correct overestimation due to brittle cracking. The estimated fracture toughness values are shown to consistent with the published API X70 and X42 test data.

Original languageEnglish
Article number105193
JournalEuropean Journal of Mechanics, A/Solids
Volume103
DOIs
Publication statusPublished - 2024 Jan 1

Bibliographical note

Publisher Copyright:
© 2023 Elsevier Masson SAS

Keywords

  • Combined ductile and brittle fracture mode
  • Ductile fracture mode
  • Fracture toughness estimation
  • Small punch test in hydrogen

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering
  • General Physics and Astronomy

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