Nucleation mechanism of intra-granular blisters in tungsten exposed to hydrogen plasma

TitleNucleation mechanism of intra-granular blisters in tungsten exposed to hydrogen plasma
Publication TypeJournal Article
Year of Publication2020
AuthorsW.Q Chen, X.Y Wang, K.L Li, Y.N Wang, T.W Morgan, B. Xu, Y.L Chiu, W. Liu
JournalScripta Materialia
Volume187
Pagination243-249
Date Published10/2020
Abstract

Despite being a subject of long-term research on fusion-reactor structural materials, the behaviour of hydrogen in tungsten under plasma exposure remains unclear. Here, the explicit transmission electron microscopy observations for recrystallised W after hydrogen plasma exposure are successfully obtained. These are the first observations to show the intra-granular blisters are located on the {100} planes. Molecular dynamics simulations confirm the hydrogen blister initiating at dislocation core behaved similarly to those in experiment. We propose that the widely reported intra-granular hydrogen blisters are nucleated at the edge dislocation core and develop along the (100) plane in tungsten.

DOI10.1016/j.scriptamat.2020.06.024
Division

PSI

Department

PMI

PID

245f6cd251c7e150df00db681ef97938

Alternate TitleScr. Mater.

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