IAM - Materials- and Biomechanics

Irradiation Influence

The research activities of the group aim at the study of neutron irradiation effects in the materials for highly loaded in-vessel components of future fusion power plants
STEM-HAADF image (inverted contrast) of neutron irradiated EUROFER97. Defect microstructure showing dislocation loops, clusters (black dots) and line dislocations after irradiation to 15 dpa@330°C.
Neutron irradiated EUROFER97 (STEM-HAADF, inverted contrast)
Helium bubble evolution in EUROFER97 under (He&Fe) dual ion beam  irradiation simulated by the coupled rate-theory model incorporated with variable gap model
Helium bubble evolution in EUROFER97

Fission neutron irradiations in material test reactors together with surrogate ion irradiation experiments are implemented for the simulation of irradiation effects and their dependence on the irradiation temperature and damage dose. The in-depth study of the radiation damage is carried out by means of high-resolution TEM coupled with modern analytics to understand the mechanisms for mechanical properties degradation and to support the development of advanced modelling tools for the prediction of irradiation effects. Furthermore, the degradation of mechanical properties is quantified in order to provide input for the assessment of the reliability of in-vessel components. Wide variety of microstructural characterization methods and mechanical testing are applied both in the Hot Cells of Fusion Materials Lab as well as in the cold labs.

 

Current reaserch projects

 

-  Neutron irradiation influence on the mechanical and fracture-mechanical properties of RAFM steels and tungsten alloys (E. Gaganidze, A. Chauhan)

-  Quantitative TEM study of radiation defect microstructure in RAFM steels and tungsten alloys (A. Chauhan, Q. Yuan, E. Gaganidze)

-  Characterization and modeling of helium cluster formation and growth in RAFM steels under irradiation (J. Gao, E. Gaganidze)

-  Modelling of deformation and damage behavior of neutron irradiated RAFM steels (R. Rajakrishnan, J. Aktaa, E. Gaganidze)

-  Development of Material Database and Properties Handbook (E. Gaganidze, S. Ahmad, J. Gao)