Hydrogen diffusivity and tensile-ductility loss of solution-treated austenitic stainless steels with external and internal hydrogen

Junichiro Yamabe, Osamu Takakuwa, Hisao Matsunaga, Hisatake Itoga, Saburo Matsuoka

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

The effects of external and internal hydrogen on the slow-strain-rate tensile (SSRT) properties at room temperature were studied for ten types of solution-treated austenitic stainless steels containing a small amount of additive elements. The hydrogen diffusivity and solubility of the steels were measured with high-pressure hydrogen gas. The remarkable tensile-ductility loss observed in the SSRT tests was attributed to hydrogen-induced successive crack growth (HISCG) and was successfully quantified according to the nickel-equivalent content (Nieq), which represents the stability of the austenitic phase. The relative reduction in area (RRA) of the steels with a larger Nieq was influenced by the hydrogen distribution, whereas that of the steels with a smaller Nieq was not. This unique trend was interpreted with regard to the hydrogen distribution and fracture morphology (HISCG or microvoid coalescence).

Original languageEnglish
Pages (from-to)13289-13299
Number of pages11
JournalInternational Journal of Hydrogen Energy
Volume42
Issue number18
DOIs
Publication statusPublished - May 4 2017

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austenitic stainless steels
Austenitic stainless steel
ductility
diffusivity
Ductility
Hydrogen
hydrogen
Nickel
nickel
steels
strain rate
Steel
Strain rate
Crack propagation
cracks
tensile properties
tensile tests
Coalescence
Tensile properties
Chemical elements

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 diffusivity and tensile-ductility loss of solution-treated austenitic stainless steels with external and internal hydrogen. / Yamabe, Junichiro; Takakuwa, Osamu; Matsunaga, Hisao; Itoga, Hisatake; Matsuoka, Saburo.

In: International Journal of Hydrogen Energy, Vol. 42, No. 18, 04.05.2017, p. 13289-13299.

Research output: Contribution to journalArticle

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