Critical grain size to limit the hydrogen-induced ductility drop in a metastable austenitic steel

Arnaud Macadre, Nobuo Nakada, Toshihiro Tsuchiyama, Setsuo Takaki

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The metastable austenitic stainless steel is Fe-16Cr-10Ni, of which the grain size can be controlled between 1 and 21 μm. Hydrogen precharging causes a critical drop in ductility during tensile tests for the largest grain size (21 μm). In order to understand how efficient grain refinement is against hydrogen-induced ductility reduction, by varying the heat treatment conditions, it was possible to manufacture six different grain sizes and pinpoint the grain size at which the drop of ductility is critical. This change in ductility was associated with a transition from fully ductile fracture surface to a fracture surface composed of dimples, quasi-cleavages and intergranular fracture.

Original languageEnglish
Pages (from-to)10697-10703
Number of pages7
JournalInternational Journal of Hydrogen Energy
Volume40
Issue number33
DOIs
Publication statusPublished - Sep 7 2015

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Austenitic steel
ductility
Ductility
grain size
steels
Hydrogen
hydrogen
Ductile fracture
austenitic stainless steels
Grain refinement
Austenitic stainless steel
tensile tests
cleavage
heat treatment
Heat treatment
causes

All Science Journal Classification (ASJC) codes

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

Cite this

Critical grain size to limit the hydrogen-induced ductility drop in a metastable austenitic steel. / Macadre, Arnaud; Nakada, Nobuo; Tsuchiyama, Toshihiro; Takaki, Setsuo.

In: International Journal of Hydrogen Energy, Vol. 40, No. 33, 07.09.2015, p. 10697-10703.

Research output: Contribution to journalArticle

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