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

Arnaud Macadre; Nobuo Nakada; Toshihiro Tsuchiyama; Setsuo Takaki

doi:10.1016/j.ijhydene.2015.06.111

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

Arnaud Macadre, Nobuo Nakada, Toshihiro Tsuchiyama, Setsuo Takaki

Materials Processing

Research output: Contribution to journal › Article › peer-review

18 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 language	English
Pages (from-to)	10697-10703
Number of pages	7
Journal	International Journal of Hydrogen Energy
Volume	40
Issue number	33
DOIs	https://doi.org/10.1016/j.ijhydene.2015.06.111
Publication status	Published - Sep 7 2015

All Science Journal Classification (ASJC) codes

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

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AU - Macadre, Arnaud

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AU - Tsuchiyama, Toshihiro

AU - Takaki, Setsuo

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