Electrochemical evaluation of radiation-induced segregation in austenitic stainless steels with oversize solute addition

Parag M. Ahmedabadi, V. Kain, M. Gupta, I. Samajdar, S. Sharma, P. Bhagwat, Y. Watanabe

Research output: Contribution to journalArticlepeer-review

Abstract

Effect of different levels of oversize element, cerium, on radiation-induced segregation (RIS) in type 316 stainless steel was investigated. The effect of prior cold-work on RIS was also investigated. Samples with 0.00, 0.01, and 0.04 wt.% cerium were irradiated to 0.70 dpa using 4.8 MeV protons at 300 °C. Characterization of proton-irradiated specimens was carried out using electrochemical potentiokinetic reactivation (EPR) test followed by atomic force microscopic examination. The specimen with prior cold-work (without cerium addition) showed the lowest EPR values indicating the lowest chromium depletion in this material. The specimen with 0.04 wt.% cerium showed the lower EPR value as compared to the specimen with 0.01 wt.% Ce. The irradiated specimen with prior cold-work showed linear features after the EPR tests and such features were attributed to decoration of dislocations, generated due to prior cold-work, by point defects produced during irradiation. The resistance to RIS offered by cold-work (linear features) has been more effective as compared to that by the addition of oversize solute addition.

Original languageEnglish
Pages (from-to)2472-2479
Number of pages8
JournalJournal of Materials Engineering and Performance
Volume21
Issue number11
DOIs
Publication statusPublished - 2012 Nov 1

Keywords

  • Atomic force microscopy
  • Austenitic stainless steel
  • Cold-work
  • Electrochemical potentiokinetic reactivation
  • Oversize solute
  • Proton-irradiation

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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