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Predicting non-equilibrium patterns beyond thermodynamic concepts: application to radiation induced microstructures.

Abstract : In this work, we derive an analytical model to predict the appearance of all possible radiation-induced steady states and their associated microstructures in immiscible A$_{\bar c}$B$_{1- \bar c}$alloys, an example of a non equilibrium dynamical system. This model is assessed against numerical simulations and experimental results which show that different microstructures characterized by the patterning of A-rich precipitates can emerge under irradiation. We demonstrate that the steady-state microstructure is governed by irradiation conditions but also by the average initial concentration of the alloy $\bar c$. Such a dependence offers new leverage for tailoring materials with specific microstructures overcoming limitations imposed by the equilibrium thermodynamic phase diagram.
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Submitted on : Monday, July 11, 2022 - 3:40:08 PM
Last modification on : Thursday, July 14, 2022 - 3:31:14 AM

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Laurence Luneville, Philippe Garcia, David Simeone. Predicting non-equilibrium patterns beyond thermodynamic concepts: application to radiation induced microstructures.. Physical Review Letters, American Physical Society, 2020, 124, pp.085701. ⟨10.1103/PhysRevLett.124.085701⟩. ⟨cea-03719957⟩

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