Underwater explosive welding of tungsten to reduced-activation ferritic steel F82H

Daichi Mori, Ryuta Kasada, Satoshi Konishi, Yasuhiro Morizono, Kazuyuki Hokamoto

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


The present study reports the underwater explosive welding of commercially pure tungsten onto the surface of a reduced-activation ferritic steel F82H plate. Cross-sectional observation revealed the formation of a wave-like interface, consisting of a thin mixed layer of W and F82H. The results of nanoindentation hardness testing identified a gradual progressive change in the interface, with no hardened or brittle layer being observed. Small punch tests on the welded specimens resulted in cracking at the center of the tungsten, followed by crack propagation toward both the tungsten surface and the tungsten/steel interface.

Original languageEnglish
Pages (from-to)1086-1090
Number of pages5
JournalFusion Engineering and Design
Issue number7-8
Publication statusPublished - 2014 Oct


  • Blanket first wall
  • Divertor
  • Reduced-activation ferritic steel
  • Tungsten
  • Underwater explosive welding


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