1. Reduced Activation Ferritic Martensitic (RAFM) steels for fusion and fission application
Unraveling irradiation-induced embrittlement in steels for nuclear applications
Inês Carvalho, Alexander Fedorov, Henk Schut, Jilt Sietsma, A. Ilker Topuz, Erik van der Giessen

2. Modelling of irradiation-induced hardening and creep in F/M alloys
Task – Study of effect of Cr-Ni-(Si/P) clusters on irradiation hardening
Attempt to develop a numerical framework to predict how irradiation affects dislocation mobility and, by that, promotes brittle failure and increases the ductile-to-brittle transition.
Principal Investigator: Alexander Fedorov
NRG

3. Two PhD projects: NRG-M2i-TU Delft-RUG
PhD at TU Delft: Inês Carvalho
Project title: Reduced Activation Ferritic Martensitic (RAFM) steels for fusion application
Aim of the project: to establish a relationship between the irradiation-induced defect structures and the observed changes in the mechanical properties
Participation:
TU Delft: Ines Carvalho, Jilt Sietsma (Prof.), Henk Schut,
NRG : Alexander Fedorov, Natalia Luzginova
PhD at University of Groningen (RUG): Ilker Topuz
Project title: Unraveling irradiation-induced embrittlement in steels for nuclear applications
Aim of the project: to generate understanding on the competition between plastic deformation and brittle crack propagation in irradiated steels at various temperatures. The numerical framework that will be developed (DD) should be able to serve as a tool to predict irradiation embrittlement of prototype alloys.
RUG: : Ilker Topuz, Erik van der Giessen (Prof.)
TU Delft: Lucia Nicola
NRG: Alexander Fedorov, Natalia Luzginova

4. PhD in TU Delft: Reduced Activation Ferritic Martensitic (RAFM) steels for fusion application
MAT-IREMEV, Garching, 3–5 December 2012

5. NRG mechanical tests data base on EUROFER (ODS)
Bird's-eye view on two projects
MD: interaction between defects and dislocations
NRG mechanical tests data base on EUROFER (ODS)
MF: evolution of point defect clusters with dose and temperature
DD modeling (RUG)
Nrg has mechanical test data on neutron irradiated samples (sumo)\
Goal-explain and model the results
TDS/PA (experimental) characterize defects (ion implantation) in terms of thermal stability, concentration, sizes
We use TDS/PA results+literature data (MD&MF(mean field) calculation results) to feed into DD model (concentration of defects, (or their mean distance) and their integration with dislocations)
TDS and PA experiments
(TUD)
other experiments on EUROFER (ODS) and Fe-Cr found in the literature

6. Summary of PA and TDS observations
At implantation temperature (RT)
Vacancies are barely mobile  their concentration is relatively high and strongly depends on the temperature and implantation current  low reproducibility and difficult to compare different experiments
vacancy clusters are unstable at RT.
K, HemVn clusters lose vacancies; He:V ratio increases

7. Dislocation Source-Obstacle Interaction
crack
cohesive zone
K field
s, e
source
obstacle

8. Transition from 3D to 1D
work is in progress