By applying the technique of local dosimetry and micro-indentation, the micro-hardness depth profile is directly determined for molybdenum specimens, which are bombarded by 10 MeV 4 He + -ions at about 300°C to fluences of 1 × 10 20 ∼ 7 × 10 21 ion/m 2 . The depth profile is similar to the damage energy profile and has a sharp peak with a front plateau. The degree of radiation hardening at peak and plateau regions differs in fluence dependence and in post-irradiation annealing behavior. This may be attributed to the role of implanted helium. The influence on radiation hardening of material purity, cold work and alloying with zirconium is also studied.
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Nuclear Energy and Engineering
- Materials Science(all)