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

Afrooz Barnoush; Masoud Asgari; Roy Johnsen

doi:10.1016/j.scriptamat.2011.12.004

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

Afrooz Barnoush^*, Masoud Asgari, Roy Johnsen

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

107 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	414-417
Number of pages	4
Journal	Scripta Materialia
Volume	66
Issue number	6
DOIs	https://doi.org/10.1016/j.scriptamat.2011.12.004
Publication status	Published - Mar 2012
Externally published	Yes

Keywords

Dislocation
Hydrogen embrittelement
Indentation size effect
Nanoindentation
Stainless steel

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10.1016/j.scriptamat.2011.12.004

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abstract = "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.",

keywords = "Dislocation, Hydrogen embrittelement, Indentation size effect, Nanoindentation, Stainless steel",

author = "Afrooz Barnoush and Masoud Asgari and Roy Johnsen",

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AU - Barnoush, Afrooz

AU - Asgari, Masoud

AU - Johnsen, Roy

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N2 - 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.

AB - 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.

KW - Dislocation

KW - Hydrogen embrittelement

KW - Indentation size effect

KW - Nanoindentation

KW - Stainless steel

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U2 - 10.1016/j.scriptamat.2011.12.004

DO - 10.1016/j.scriptamat.2011.12.004

M3 - Article

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SN - 1359-6462

VL - 66

SP - 414

EP - 417

JO - Scripta Materialia

JF - Scripta Materialia

IS - 6

ER -

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

Abstract

Keywords

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