Effect of nickel content on the neutron irradiation embrittlement of Ni-Mo-Cr steels

Chang Hoon Lee, R. Kasada, A. Kimura, Bong Sang Lee, Dong Woo Suh, Hu Chul Lee

Research output: Contribution to journalArticlepeer-review

Abstract

The influence of nickel on the neutron irradiation embrittlement of Ni-Mo-Cr reactor pressure vessel (RPV) steels was investigated using alloys containing nickel in the range of 0.9-3.5 wt%. In all investigated alloys, the neutron irradiation with two dose conditions of 4.5 × 1019 neutron/cm2 at 290 C and 9.0 × 1019 neutron/cm 2 at 290 C, respectively, increased the hardness and ductile-to-brittle transition temperature (DBTT). However, the increases of the hardness and DBTT resulting from the neutron irradiation were primarily affected by the irradiation dose that is closely related to the generation of irradiation defects, but not by the nickel content. In addition, a linear relationship between the changes in the hardness and DBTT subjected to the irradiation was confirmed. These results demonstrate that increasing the nickel content up to 3.5 wt% does not have a harmful effect on the irradiation embrittlement of Ni-Mo-Cr reactor pressure vessel (RPV) steels.

Original languageEnglish
Pages (from-to)1203-1208
Number of pages6
JournalMetals and Materials International
Volume19
Issue number6
DOIs
Publication statusPublished - 2013 Nov 1
Externally publishedYes

Keywords

  • alloys
  • ductile-to-brittle transition temperature (DBTT)
  • fracture
  • microstructure
  • neutron

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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