Effects of stress on radiation hardening and microstructural evolution in A533B steel

K. Fujii, K. Fukuya, R. Kasada, A. Kimura, T. Ohkubo

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

Bent specimens of A533B steel (0.16 wt% Cu) were irradiated at 290 °C to 1 dpa with 6.4 MeV Fe3+ ions. Calculated tensile stresses at the irradiated surface were set to 0, 250, 500 and 750 MPa. The specimens were subjected to hardness measurements, transmission electron microscopy (TEM) observations and three-dimensional atom probe (3DAP) analysis. The radiation-induced hardening decreased with increasing stress to 500 MPa which was near the yield strength. TEM and 3DAP results showed that well-defined dislocation loops and solute clusters were formed. The diameter of dislocation loops increased and the number density decreased when the stress was applied, whereas the diameter and number density of solute clusters decreased. The hardening was mainly attributed to solute cluster formation. Application of tensile stress would control hardening by suppressing the solute cluster nucleation and growth.

Original languageEnglish
Pages (from-to)151-156
Number of pages6
JournalJournal of Nuclear Materials
Volume407
Issue number3
DOIs
Publication statusPublished - 2010 Dec 31
Externally publishedYes

ASJC Scopus subject areas

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

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