Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7987313 | Nuclear Materials and Energy | 2018 | 6 Pages |
Abstract
Fusion like conditions for reduced activation ferritic/martensitic steels in the first wall are simulated with single Fe3+ and He+/Fe3+ dual ion beam irradiation of EUROFER97 at the Jannus laboratory, CEA Saclay, introducing a damage of 16 dpa and a helium content up to 260 appm. The samples are irradiated at temperatures of 330â¯Â°C, 400â¯Â°C and 500â¯Â°C. The quantitative determination of size distribution and density of dislocation loops is obtained using weak-beam dark-field imaging mode. Burgers vectors of a02ã111ã are observed for the majority of dislocation loops at irradiation temperatures of 330â¯Â°C and 400â¯Â°C. At 500â¯Â°C no dislocation loops are found. The impact of single and dual ion beam irradiation on mechanical properties is determined by means of nanoindentation. An increase in nano-hardness of up to 35% due to irradiation was measured at samples irradiated at 400â¯Â°C. A kinetic rate model is applied for the description of nucleation and evolution of helium bubbles and compared with the experimental results. Evaluating the rate model with help of TEM-results for size and density of bubbles indicates the nucleation scheme as the main source for quantitative disagreement between the model and irradiation.
Related Topics
Physical Sciences and Engineering
Energy
Nuclear Energy and Engineering
Authors
B. Kaiser, E. Gaganidze, C. Dethloff, R. Schwaiger, D. Brimbal, M. Payet, L. Beck, J. Aktaa,