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 language | English |
|---|---|
| Pages (from-to) | 2472-2479 |
| Number of pages | 8 |
| Journal | Journal of Materials Engineering and Performance |
| Volume | 21 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 2012 Nov |
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