Skip to Main content Skip to Navigation
Conference papers

Hydrogen - Plasticity interactions : modelling and experiments in hydrogenated nickel alloys

Abstract : The effect of hydrogen on tensile tests of nickel and binary nickel - 16 wt. % chromium is analysed in terms of solute drag phenomenon. Static Strain Ageing experiments are used to measure the saturated dislocation pinning force as a function of the H concentration. First order hydrogen - dislocation interactions causes a shielding of the pair interactions between edge dislocations. The influence of this screening effect is analytically evaluated on the selfenergy and line tension of curved dislocations, the critical force for the expansion of a dislocation loop and the dissociation mechanism. These results are used to interpret experimental results on the plastic flow of hydrogen-charged nickel single crystals oriented for easy glide. This study illustrates the mechanisms of H - dislocation interactions and their consequences on the different contributions of hydrogen to the flow stress of nickel.
Document type :
Conference papers
Complete list of metadata

Cited literature [17 references]  Display  Hide  Download
Contributor : David Delafosse Connect in order to contact the contributor
Submitted on : Sunday, October 12, 2014 - 12:20:18 AM
Last modification on : Monday, October 5, 2020 - 11:38:10 AM
Long-term archiving on: : Tuesday, January 13, 2015 - 10:06:00 AM


Files produced by the author(s)




David Delafosse, Gouenou Girardin. Hydrogen - Plasticity interactions : modelling and experiments in hydrogenated nickel alloys. 5th Euromech Solid Mechanics Conference, Aug 2003, Thessalonique, Greece. pp.151, ⟨10.1515/JMBM.2005.16.3.151⟩. ⟨emse-01074021⟩



Record views


Files downloads