Hydrogen embrittlement associated with strain localization in a precipitation-hardened Fe-Mn-Al-C light weight austenitic steel

Motomichi Koyama, Hauke Springer, Sergiy V. Merzlikin, Kaneaki Tsuzaki, Eiji Akiyama, Dierk Raabe

Research output: Contribution to journalArticle

93 Citations (Scopus)

Abstract

Hydrogen embrittlement of a precipitation-hardened Fe-26Mn-11Al-1.2C (wt.%) austenitic steel was examined by tensile testing under hydrogen charging and thermal desorption analysis. While the high strength of the alloy (>1 GPa) was not affected, hydrogen charging reduced the engineering tensile elongation from 44 to only 5%. Hydrogen-assisted cracking mechanisms were studied via the joint use of electron backscatter diffraction analysis and orientation-optimized electron channeling contrast imaging. The observed embrittlement was mainly due to two mechanisms, namely, grain boundary triple junction cracking and slip-localization-induced intergranular cracking along micro-voids formed on grain boundaries. Grain boundary triple junction cracking occurs preferentially, while the microscopically ductile slip-localization-induced intergranular cracking assists crack growth during plastic deformation resulting in macroscopic brittle fracture appearance.

Original languageEnglish
Pages (from-to)4634-4646
Number of pages13
JournalInternational Journal of Hydrogen Energy
Volume39
Issue number9
DOIs
Publication statusPublished - Mar 18 2014

Fingerprint

hydrogen embrittlement
Hydrogen embrittlement
Austenitic steel
Grain boundaries
grain boundaries
steels
Hydrogen
charging
slip
hydrogen
Thermal desorption
embrittlement
Tensile testing
Brittle fracture
Embrittlement
high strength
Electron diffraction
elongation
plastic deformation
voids

All Science Journal Classification (ASJC) codes

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

Cite this

Hydrogen embrittlement associated with strain localization in a precipitation-hardened Fe-Mn-Al-C light weight austenitic steel. / Koyama, Motomichi; Springer, Hauke; Merzlikin, Sergiy V.; Tsuzaki, Kaneaki; Akiyama, Eiji; Raabe, Dierk.

In: International Journal of Hydrogen Energy, Vol. 39, No. 9, 18.03.2014, p. 4634-4646.

Research output: Contribution to journalArticle

Koyama, Motomichi ; Springer, Hauke ; Merzlikin, Sergiy V. ; Tsuzaki, Kaneaki ; Akiyama, Eiji ; Raabe, Dierk. / Hydrogen embrittlement associated with strain localization in a precipitation-hardened Fe-Mn-Al-C light weight austenitic steel. In: International Journal of Hydrogen Energy. 2014 ; Vol. 39, No. 9. pp. 4634-4646.
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