Radiation-hardening and nano-cluster formation in neutron-irradiated 9Cr–2W low activation steels with different Si contents

Y. F. Zhang, Q. Zhan, S. Ohnuki, A. Kimura, F. R. Wan, K. Yoshida, Y. Nagai

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Two kinds of 9Cr–2W steels with and without the addition of 0.1 wt% Si were irradiated with neutrons up to a fluence of 4.8 × 10 23 n/m 2 at 563 K. Precipitates, dislocation loops, radiation-enhanced nano-clusters and radiation-hardening were studied using advanced electron microscopy and micro-hardness test. Si reduced the number density of dislocation loops, and therefore the extent of radiation-hardening decreased. It also favored the formation of silicide-like nano-clusters. In this study, the role of Si in neutron irradiated 9Cr–2W steels is discussed, and then extended to nano-clusters and irradiation-hardening.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalJournal of Nuclear Materials
Volume517
DOIs
Publication statusPublished - 2019 Apr 15

Keywords

  • Dislocation loops
  • Ferritic and martensitic steels
  • Neutron irradiation
  • Radiation-enhanced nano-clusters
  • Radiation-hardening
  • Silicon

ASJC Scopus subject areas

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

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