Direct observation of hydrogen-enhanced plasticity in super duplex stainless steel by means of in situ electrochemical methods

Afrooz Barnoush*, Mohammad Zamanzade, Horst Vehoff

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

55 Citations (Scopus)

Abstract

In situ electrochemical hydrogen charging in combination with atomic force microscopy and optical microscopy has been used to study the effect of hydrogen on the austenite phase in super duplex stainless steel. Observations showed that hydrogen charging results in an irreversible deformation of austenite. High residual tensile stresses form in austenite during quench annealing. These stresses, in combination with the activation of dislocation sources by hydrogen, result in formation of slip lines on the austenite surface during in situ hydrogen charging.

Original languageEnglish
Pages (from-to)242-245
Number of pages4
JournalScripta Materialia
Volume62
Issue number5
DOIs
Publication statusPublished - Mar 2010
Externally publishedYes

Keywords

  • Atomic force microscopy
  • Dislocation
  • Hydrogen embrittlement
  • Magnetic force microscopy
  • Residual stress

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