Defect cluster formation under electron irradiation in an Fe-Cr-Ni austenitic pure ternary alloy and alloys containing over-sized solutes (niobium and titanium) has been investigated with a HVEM at temperatures between 293 K and 873 K. The interstitial loop density and its temperature dependence, which were drastically changed by small addition of sub-sized solute (P, Si and S), were not affected by titanium and niobium additions. Above 423 K, vacancy type defects clusters (loop and SFT) were formed in the pure ternary alloy along with interstitial loops. By niobium (titanium) additions, on the other hand, formation of a vacancy defect cluster below 450 K was strongly suppressed. These phenomena seemed to be due to the low and high binding energies of interstitial-solute and vacancy-solute, respectively.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Materials Science(all)
- Nuclear Energy and Engineering