Hydrogen-assisted damage evolution in nitrogen-doped duplex stainless steel

Milene Yumi Maeda, Motomichi Koyama, Hayato Nishimura, Osvaldo Mitsuyuki Cintho, Eiji Akiyama

Research output: Contribution to journalArticlepeer-review

Abstract

The effects of hydrogen on the ductility loss and fracture behavior of a nitrogen-doped duplex stainless steel were investigated via tensile testing after electrochemical hydrogen pre-charging. Post-mortem microstructure analyses were performed to characterize the microstructural damage evolution and fracture surface. Hydrogen charging of the steel resulted in quasi-cleavage and intergranular fractures, which were associated with transgranular austenite cracking and ferrite/austenite interface cracking, respectively. The crucial factors that resulted in brittle-like cracking were deformation twinning in austenite and nitrogen-related solution hardening.

Original languageEnglish
Pages (from-to)2716-2728
Number of pages13
JournalInternational Journal of Hydrogen Energy
Volume46
Issue number2
DOIs
Publication statusPublished - 2021 Jan 6

Keywords

  • Duplex stainless steel
  • EBSD
  • Hydrogen embrittlement
  • Microstructure
  • SEM
  • Twinning

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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