Effect of hydrogen on dislocation nucleation in alloy 718

Stenerud, G.; Johnsen, Roy; Olsen, J.; He, J.; Barnoush, Afrooz

doi:10.1016/j.ijhydene.2017.04.290

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Authors

Stenerud, G.

Johnsen, Roy

Olsen, J.

He, J.

Barnoush, Afrooz

Date

2017

Type

Journal Article

Metadata

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Citation

Stenerud, G. and Johnsen, R. and Olsen, J. and He, J. and Barnoush, A. 2017. Effect of hydrogen on dislocation nucleation in alloy 718. International Journal of Hydrogen Energy. 42 (24): pp. 15933-15942.

Source Title

International Journal of Hydrogen Energy

DOI

10.1016/j.ijhydene.2017.04.290

ISSN

0360-3199

School

WASM: Minerals, Energy and Chemical Engineering (WASM-MECE)

URI

http://hdl.handle.net/20.500.11937/71293

Collection

Curtin Research Publications

Abstract

© 2017 Hydrogen Energy Publications LLC In situ electrochemical nanoindentation has been used to study the effect of hydrogen on the nanomechanical response of Alloy 718. Observations show that hardness increase as a result of hydrogen charging. Also, the hydrogen charging gives a reduced pop-in load and pop-in width. This is related to a reduction in the energy needed for dislocation nucleation and the mobility of the dislocations in the presence of hydrogen. Two grains with different orientations has been tested here. The pop-in load and width obtained in the (101) orientation was more affected by the presence of hydrogen than those achieved in the (111) oriented grain.