Resolving the hydrogen effect on dislocation nucleation and mobility by electrochemical nanoindentation

Electrochemical nanoindentation is used to study the in situ effect of electrochemically charged hydrogen on the mechanical properties of austenitic stainless steel (ASS). In addition to the observed reduction of the pop-in load and the increase of the hardness, a novel analysis method based on the Taylor assumption and the indentation size effect is used to calculate the effect of hydrogen on lattice friction. The reduction of the pop-in load is explained within the framework of the defactant model.

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