Irradiation-based design of mechanically resistant microstructures tuned viamultiscale phase-field modeling

Gilles Demange (1) , S. Depinoy (2) , L. Luneville (3, 4) , D. Simeone (5, 4) , V. Pontikis (5, 6)

1 GPM - Groupe de physique des matériaux
2 ULB - Université libre de Bruxelles
3 SERMA - Service d’Études des Réacteurs et de Mathématiques Appliquées
4 SPMS - Laboratoire Structures, Propriétés et Modélisation des solides
5 SRMA - Service des Recherches Métallurgiques Appliquées
6 IRAMIS - Institut Rayonnement Matière de Saclay

We present a multi-scale phase field modeling of stationary microstructures produced under 1MeV krypton ion irradiation in a phase separating concentrated solid solution of silver and copper.We show that the mixture reaches ultimately a stationary micro-structural state made of phasedomains with composition and size distribution mapped to the values of the incident ux of particlesand of the temperature, variables that help designing a non equilibrium phase-diagram for theirradiated alloy. The modeling predicts the formation of diverse microstructures likely connected tospinodal hardening, thus opening the perspective of the on-purpose tuning of mechanically resistantmicrostructures and the preparation of metastable alloys with mechanical properties improved bycomparison to counterparts obtained via classical thermo-mechanical treatments.

Keywords: multi-échelle; irradiation; micro structure; propriété mécanique

Domains: Physics [physics]; Nuclear Experiment [nucl-ex]; Physics [physics]; Nuclear Theory [nucl-th]

Gilles Demange, S. Depinoy, L. Luneville, D. Simeone, V. Pontikis. Irradiation-based design of mechanically resistant microstructures tuned viamultiscale phase-field modeling. Scientific Reports, 2018, 8 (1), pp.10237. ⟨10.1038/s41598-018-28685-3⟩. ⟨cea-02339614⟩