Evaluating the three-dimensional stress tensor fields in cyclically deformed EUROFER97

Clean, sustainable, and predictable energy may be produced via nuclear fusion in the not-too-distant future. However, given that fusion reactors operate at elevated temperatures under complex cyclic loading regimes, the fatigue behaviour of the structural steel, EUROFER97, and its relationship with the development and evolution of intragranular stress tensor fields must be evaluated. This is essential for the qualification of in-vessel components and will shed significant light on the microstructural aspects of the mechanisms permitting fatigue failure. Considering the above, we propose to measure both the intergranular (type II) and intragranular (type III) three-dimensional stress tensor fields before and after the fatigue testing of EUROFER97 using scanning 3DXRD and the ID11 beamline.