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Stress-dependent hardening-to-softening transition of hydrogen effects in nanoindentation of a linepipe steel
- Source :
- International Journal of Hydrogen Energy. 39:1897-1902
- Publication Year :
- 2014
- Publisher :
- Elsevier BV, 2014.
-
Abstract
- We explored the influences of hydrogen on small-scale strength of a linepipe steel through nanoindentation experiments with four pyramidal indenters. Interestingly, a transition from hydrogen-induced hardening to softening was observed as indenter sharpness increases. The transition was analyzed based on the enhancement in hydrogen's elastic shielding effects for a sharper indenter, which could be indirectly evidenced by the stress effects on indentation pile-up, dislocation density, and rate dependency of hardness.
- Subjects :
- Materials science
Stress effects
Hydrogen
Renewable Energy, Sustainability and the Environment
Metallurgy
Energy Engineering and Power Technology
chemistry.chemical_element
Nanoindentation
Condensed Matter Physics
Fuel Technology
chemistry
Indentation
Electromagnetic shielding
Hardening (metallurgy)
Rate dependency
Softening
Subjects
Details
- ISSN :
- 03603199
- Volume :
- 39
- Database :
- OpenAIRE
- Journal :
- International Journal of Hydrogen Energy
- Accession number :
- edsair.doi...........7505ff243066faf94f9a6ccbdcaad661