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

W. Q. Chen, X. Y. Wang*, K. L. Li, Y. N. Wang, T. W. Morgan, B. Xu, Y. L. Chiu, W. Liu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


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 <100> dislocation core behaved similarly to those in experiment. We propose that the widely reported intra-granular hydrogen blisters are nucleated at the <100> edge dislocation core and develop along the (100) plane in tungsten.

Original languageEnglish
Pages (from-to)243-249
Number of pages7
JournalScripta Materialia
Early online date21 Jun 2020
Publication statusPublished - Oct 2020


  • Blister
  • Hydrogen plasma
  • Nucleation mechanism
  • Tungsten

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys


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