Effects of iron concentration on the microstructure of V-Fe alloys after low-dose neutron irradiation

Naoko Oono, Nobuyasu Nita, Yosuke Abe, Yuhki Satoh, Hideki Matsui

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

To examine the mechanism of huge swelling of V-Fe alloys, TEM observation was applied to V-x at.%Fe (x = 0, 0.3, 1, 5, 7), after low-dose neutron irradiation of 0.1-1.17 dpa at 400-600 °C. Concentric Multi-Dislocation Loops (CMDLs) and rafts were observed in V-Fe alloys irradiated to 0.1 dpa. Voids were observed only within dislocation loops in both types of configurations. Ashby-Brown (AB) contrasts were always observed around voids, indicating that shell-like iron segregation with substantial elastic strain exists on the inner surface of the voids. For 1.17 dpa, swelling V-Fe alloys was always greater than those of un-alloyed vanadium, whatever the dislocation microstructures. Implication of a segregation shell in the swelling mechanism is discussed in addition to a model based on the dislocation bias.

Original languageEnglish
Pages (from-to)38-45
Number of pages8
JournalJournal of Nuclear Materials
Volume418
Issue number1-3
DOIs
Publication statusPublished - 2011 Nov 1

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Materials Science(all)
  • Nuclear Energy and Engineering

Fingerprint Dive into the research topics of 'Effects of iron concentration on the microstructure of V-Fe alloys after low-dose neutron irradiation'. Together they form a unique fingerprint.

Cite this