EXAFS characterization of element specific local ordering in high entropy alloys submitted to irradiation.

Pure and interstitial incorporated High entropy alloys shows unpaired properties in terms of mechanical behaviour and irradiation resistance, making them outstanding candidates for renewal in harsh environment industries and applications in space, accelerator physics and nuclear energy. However, the radiation resistance underpinning mechanism is still an open question and requires a detailed understanding of the atomic-scale interstitial-defect-lattice interactions. Extensive theoretical and experimental studies are currently underway to understand and harness the role played by structural short range ordering to CrMnFeCoNi HEA’s irradiation resistance amazing properties. In particular, DFT predicted element specific local ordering and this proposal aims to confirm through EXAFS characterisation its existence and behaviour as a function of swift proton irradiation fluence.