Suppression mechanism of strain-age hardening in carbon steel associated with hydrogen uptake

Takuro Ogawa, Motomichi Koyama, Hiroshi Noguchi

Research output: Contribution to journalArticle

Abstract

We investigated the suppression mechanism of strain-age hardening in a ferritic carbon steel associated with hydrogen uptake. We considered hydrogen-related three factors suppressing the strain aging: 1) solution softening, for instance, arising from a reduction in Peierls potential of screw dislocations and a change in Young's modulus, 2) suppression of dislocation-carbon interaction through hydrogen/carbon site competition, and 3) change in plastic strain evolution behavior by hydrogen-enhanced localized plasticity (HELP). According to the present experiments under in-situ hydrogen charging, it was concluded that the solution softening (factor1) and the site competition (factor2) by hydrogen did not significantly suppress the strain aging but the change in the pre-straining behavior (factor3) did.

Original languageEnglish
Pages (from-to)546-551
Number of pages6
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume101
Issue number10
DOIs
Publication statusPublished - 2015 Jan 1
Externally publishedYes

Keywords

  • Hydrogen-enhanced localized plasticity (HELP)
  • Low carbon ferritic steel
  • Site competition
  • Solution hardening
  • Strain aging

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

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