Irradiation induced dislocation loop and its influence on the hardening behavior of Fe-Cr alloys by an Fe ion irradiation

摘要

Nano indentation analysis and transmission electron microscopy observation were performed to investigate a microstructural evolution and its influence on the hardening behavior in Fe-Cr alloys after an irradiation with 8 MeV Fe~(4+) ions at room temperature. Nano indentation analysis shows that an irradiation induced hardening is generated more considerably in the Fe-15Cr alloy than in the Fe-5Cr alloy by the ion irradiation. TEM observation reveals a significant population of the ao<100> dislocation loops in the Fe-15Cr alloy and an agglomeration of the l/2ao<111> dislocation loops in the Fe-5Cr alloy. The results indicate that the ao<100> dislocation loops will act as stronger obstacles to a dislocation motion than l/2ao<111> dislocation loops.