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- Title
Influence of Hydrogen-Charging Regime on Strain Hardening and Deformation Mechanism of Hot-Rolled High-Nitrogen Austenitic Steel.
- Authors
MOSKVINA, V. A.; ASTAFUROVA, E. G.; MAIER, G. G.; MELNIKOV, E. V.; GALCHENKO, N. K.; ASTAFUROVA, S. V.
- Abstract
The effect of hot-rolling and electrochemical hydrogen-charging on strength properties, strain hardening and deformation mechanisms of a high-nitrogen austenitic vanadium-containing Fe-17Cr-24Mn-1.3V-0.2C-0.8N steel was studied by uniaxial tensile tests, scanning and transmission electron microscopy. Hydrogen-charging for 15, 37, and 43 h reduces a yield strength, an ultimate tensile strength and elongation in the steel specimens. Hydrogencharging for 37-43 h leads to increase in strain-hardening coefficient at early degrees of deformation (up to 10%) compared to uncharged and 15 h-charged specimens. Hydrogen influences the deformation mechanisms of the high-nitrogen steel: besides dislocation slip, one of the main deformation mechanisms of hydrogen-containing steel specimens is mechanical twinning. Hydrogen-charging promotes twinning, microlocalization of a plastic flow and ! " martensitic transformation in the steel.
- Subjects
STRAIN hardening; DEFORMATIONS (Mechanics); AUSTENITIC steel; TENSILE tests; TRANSMISSION electron microscopy
- Publication
Acta Physica Polonica: A, 2018, Vol 134, Issue 3, p760
- ISSN
0587-4246
- Publication type
Article
- DOI
10.12693/APhysPolA.134.760