Effect of cyclic temperature change on microstructural evolution in austenitic stainless steels under fission neutron irradiation

N. Yoshida, Q. Xu, H. Watanabe, Y. Miyamoto, T. Muroga

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25 Citations (Scopus)

Abstract

To understand mechanistically the influence of cyclic temperature change on microstructural evolution in Fe-Cr-Ni austenitic alloys, temperature-cycle neutron irradiations of 473 K/673 K and 573 K/723 K were carried out at JMTR (0.9-1.4 × 1024 n/m2 (> 1.0 MeV)). Suppression of interstitial loop formation was remarkable. Only a few large voids were formed in Fe-Cr-Ni and Fe-Cr-Ni-P alloys, but unexpectedly large void swelling (1.5-1.6%, 9-11%/dpa) was observed in Fe-Cr-Ni-Ti alloy. Rate theory of defect clustering for temperature-variant irradiation indicates that vacancy-rich condition appears temporarily at the beginning of the high-temperature period due to the reclustering of the vacancies formed in the low-temperature period through the reactions with radiation-induced vacancies and interstitials.

Original languageEnglish
Pages (from-to)471-475
Number of pages5
JournalJournal of Nuclear Materials
Volume212-215
Issue numberPART 1
DOIs
Publication statusPublished - Sep 1994

All Science Journal Classification (ASJC) codes

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

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