Hydrogen embrittlement of binary high Mn austenitic steels

Motomichi Koyama, Takahiro Sawaguchi, Kaneaki Tsuzaki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We used Fe-20Mn, Fe-28Mn, Fe-32Mn, and Fe-40Mn alloys. ε-martensite in the Fe-20Mn alloy critically deteriorated the resistance to hydrogen embrittlement owing to α'-martensite. However, when ε-martensite is stable, hydrogen embrittlement susceptibility became low, particularly in the Fe-32Mn alloys, even though the formation of ε-martensite plates assisted boundary cracking. The Fe-40Mn alloys, in which no martensite forms even after fracture, showed higher hydrogen embrittlement susceptibility compared to the Fe-32Mn alloy. Namely, in Fe-Mn binary alloys, the Mn content has an optimal value for hydrogen embrittlement susceptibility because of the following two reasons: 1) The formation of stable ε-martensite seems to have a positive effect in suppressing hydrogen-enhanced localized plasticity, but causes boundary cracking, and 2) an increase in Mn content stabilizes austenite, suppressing martensite-related cracking, but probably decreases the cohesive energy of grain boundaries, causing intergranular cracking. As a consequence, the optimal Mn content was 32 wt.% in the present alloys.

Original languageEnglish
Title of host publicationICF 2017 - 14th International Conference on Fracture
EditorsEmmanuel E. Gdoutos
PublisherInternational Conference on Fracture
Pages75-76
Number of pages2
ISBN (Electronic)9780000000002
Publication statusPublished - Jan 1 2017
Event14th International Conference on Fracture, ICF 2017 - Rhodes, Greece
Duration: Jun 18 2017Jun 20 2017

Publication series

NameICF 2017 - 14th International Conference on Fracture
Volume1

Conference

Conference14th International Conference on Fracture, ICF 2017
CountryGreece
CityRhodes
Period6/18/176/20/17

Fingerprint

Hydrogen embrittlement
Austenitic steel
Martensite
Binary alloys
Austenite
Plasticity
Grain boundaries
Hydrogen

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction

Cite this

Koyama, M., Sawaguchi, T., & Tsuzaki, K. (2017). Hydrogen embrittlement of binary high Mn austenitic steels. In E. E. Gdoutos (Ed.), ICF 2017 - 14th International Conference on Fracture (pp. 75-76). (ICF 2017 - 14th International Conference on Fracture; Vol. 1). International Conference on Fracture.

Hydrogen embrittlement of binary high Mn austenitic steels. / Koyama, Motomichi; Sawaguchi, Takahiro; Tsuzaki, Kaneaki.

ICF 2017 - 14th International Conference on Fracture. ed. / Emmanuel E. Gdoutos. International Conference on Fracture, 2017. p. 75-76 (ICF 2017 - 14th International Conference on Fracture; Vol. 1).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Koyama, M, Sawaguchi, T & Tsuzaki, K 2017, Hydrogen embrittlement of binary high Mn austenitic steels. in EE Gdoutos (ed.), ICF 2017 - 14th International Conference on Fracture. ICF 2017 - 14th International Conference on Fracture, vol. 1, International Conference on Fracture, pp. 75-76, 14th International Conference on Fracture, ICF 2017, Rhodes, Greece, 6/18/17.
Koyama M, Sawaguchi T, Tsuzaki K. Hydrogen embrittlement of binary high Mn austenitic steels. In Gdoutos EE, editor, ICF 2017 - 14th International Conference on Fracture. International Conference on Fracture. 2017. p. 75-76. (ICF 2017 - 14th International Conference on Fracture).
Koyama, Motomichi ; Sawaguchi, Takahiro ; Tsuzaki, Kaneaki. / Hydrogen embrittlement of binary high Mn austenitic steels. ICF 2017 - 14th International Conference on Fracture. editor / Emmanuel E. Gdoutos. International Conference on Fracture, 2017. pp. 75-76 (ICF 2017 - 14th International Conference on Fracture).
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