Hydrogen-enhanced orientation dependence of stress relaxation and strain-aging in Hadfield steel single crystals. (15th July 2017)

• Record Type: Journal Article
• Authors: Astafurova, E.G.; Moskvina, V.A.; Maier, G.G.; Melnikov, E.V.; Zakharov, G.N.; Astafurov, S.V.; Maier, H.J.
• Is Part Of: Scripta materialia. Number 136(2017)
• Page Start: 101
• Page End: 105
• Publication Date: 2017-07-15
• Subjects: Austenitic steel -- Hydrogen -- Dislocation slip -- Twinning -- Stacking faults; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2017.04.028
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: The effects of electrochemical hydrogen charging on the stress relaxation and strain-aging of 〈111〉- and 〈001〉-oriented single crystals of Hadfield steel were studied under tension at room temperature. An orientation dependence of stress relaxation and strain-aging-assisted yield-drop phenomena was observed for hydrogen-free 〈111〉- and 〈001〉- oriented single crystals. Hydrogen charging up to five hours increased the stress relaxation rate for slip-associated deformation in 〈001〉-oriented single crystals and decreased it for twinning-assisted deformation in 〈111〉-oriented specimens. The present results demonstrate that different mechanisms dominate the interaction of hydrogen with dislocations, stacking faults and twins. Graphical abstract: