Abstract
Irradiation hardening and microstructural change of the brazed-joint of W and oxide dispersion strengthened ferritic steel (ODS-FS was investigated by nano-indentation hardness test and transmission electron microscopy after ion irradiation with 6.4MeV Fe3+ ions at 500°C up to 10 dpa. Dual-beam irradiation of Fe3+ ions and energy-degraded 1MeV He+ ion was also carried out. A considerable irradiation hardening occurred in the W base metal where dislocation loops and nano-scaled voids or He-bubbles were observed. Dual-beam irradiation enhanced the hardening. No significant hardening was observed in ODS-FS. The hardness of insert material was reduced after irradiation, which is due to the recovery of dislocations generated during joining process.
| Original language | English |
|---|---|
| Pages (from-to) | 446-450 |
| Number of pages | 5 |
| Journal | Materials Transactions |
| Volume | 54 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 2013 |
Keywords
- Hardening mechanism
- Helium-implantation
- Ion-irradiation
- Tungsten and oxide dispersion strengthened (W/ODS steel joint
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering