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Effect of hydrogen on dislocation nucleation in alloy 718

Stenerud, Gaute; Johnsen, Roy; Olsen, Jim Stian; He, Jianying; Barnoush, Afrooz
Journal article, Peer reviewed
Published version
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Stenerud (Locked)
URI
http://hdl.handle.net/11250/2596629
Date
2017
Metadata
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  • Institutt for konstruksjonsteknikk [1599]
  • Institutt for maskinteknikk og produksjon [2602]
  • Publikasjoner fra CRIStin - NTNU [21058]
Original version
International journal of hydrogen energy. 2017, 42 (24), 15933-15942.   10.1016/j.ijhydene.2017.04.290
Abstract
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.
Publisher
Elsevier
Journal
International journal of hydrogen energy

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