Hydrogen embrittlement of aluminum in aqueous environments examined by in situ electrochemical nanoindentation

Afrooz Barnoush; Horst Vehoff

doi:10.1016/j.scriptamat.2007.12.019

Hydrogen embrittlement of aluminum in aqueous environments examined by in situ electrochemical nanoindentation

Afrooz Barnoush^*, Horst Vehoff

^*Corresponding author for this work

Saarland University

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

41 Citations (Scopus)

Abstract

The hydrogen effect on the mechanical properties of aluminum was studied using an in situ electrochemical nanoindentation setup. The adsorption of hydrogen ions at the open circuit potential in a solution at pH 6 (less than the isoelectric point = 9.5) resulted in a change of pop-in load. Similar behavior was observed in a solution at pH 9 under cathodic polarization. The change in pop-in load is attributed to the hydrogen-induced reduction of cohesive energy and hydrogen segregation on dislocations.

Original language	English
Pages (from-to)	747-750
Number of pages	4
Journal	Scripta Materialia
Volume	58
Issue number	9
DOIs	https://doi.org/10.1016/j.scriptamat.2007.12.019
Publication status	Published - May 2008
Externally published	Yes

Keywords

Aluminum
Dislocation nucleation
Hydrogen embrittlement
In situ nanoindentation
Isoelectric point

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10.1016/j.scriptamat.2007.12.019

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abstract = "The hydrogen effect on the mechanical properties of aluminum was studied using an in situ electrochemical nanoindentation setup. The adsorption of hydrogen ions at the open circuit potential in a solution at pH 6 (less than the isoelectric point = 9.5) resulted in a change of pop-in load. Similar behavior was observed in a solution at pH 9 under cathodic polarization. The change in pop-in load is attributed to the hydrogen-induced reduction of cohesive energy and hydrogen segregation on dislocations.",

keywords = "Aluminum, Dislocation nucleation, Hydrogen embrittlement, In situ nanoindentation, Isoelectric point",

author = "Afrooz Barnoush and Horst Vehoff",

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AU - Barnoush, Afrooz

AU - Vehoff, Horst

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AB - The hydrogen effect on the mechanical properties of aluminum was studied using an in situ electrochemical nanoindentation setup. The adsorption of hydrogen ions at the open circuit potential in a solution at pH 6 (less than the isoelectric point = 9.5) resulted in a change of pop-in load. Similar behavior was observed in a solution at pH 9 under cathodic polarization. The change in pop-in load is attributed to the hydrogen-induced reduction of cohesive energy and hydrogen segregation on dislocations.

KW - Aluminum

KW - Dislocation nucleation

KW - Hydrogen embrittlement

KW - In situ nanoindentation

KW - Isoelectric point

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DO - 10.1016/j.scriptamat.2007.12.019

M3 - Article

AN - SCOPUS:40049102996

SN - 1359-6462

VL - 58

SP - 747

EP - 750

JO - Scripta Materialia

JF - Scripta Materialia

IS - 9

ER -

Hydrogen embrittlement of aluminum in aqueous environments examined by in situ electrochemical nanoindentation

Abstract

Keywords

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