Hydrogen diffusivity and tensile-ductility loss of solution-treated austenitic stainless steels with external and internal hydrogen
| Autor: | Osamu Takakuwa, Junichiro Yamabe, Saburo Matsuoka, Hisatake Itoga, Hisao Matsunaga |
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| Rok vydání: | 2017 |
| Předmět: |
Austenite
Materials science Hydrogen Renewable Energy Sustainability and the Environment 05 social sciences Metallurgy Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics Thermal diffusivity Fuel Technology chemistry Phase (matter) 0502 economics and business Ultimate tensile strength engineering 050207 economics Austenitic stainless steel 0210 nano-technology Microvoid coalescence Hydrogen embrittlement |
| Zdroj: | International Journal of Hydrogen Energy. 42:13289-13299 |
| ISSN: | 0360-3199 |
| DOI: | 10.1016/j.ijhydene.2017.04.055 |
| Popis: | 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). |
| Databáze: | OpenAIRE |
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