Solute diffusion by self-interstitial defects and radiation-induced segregation in ferritic Fe–X (X= Cr, Cu, Mn, Ni, P, Si) dilute alloys

L Messina, T Schuler, M Nastar, MC Marinica, P Olsson - Acta Materialia, 2020 - Elsevier
This work investigates solute transport due to self-interstitial defects and radiation induced
segregation tendencies in dilute ferritic alloys, by computing the transport coefficients of …

Exact ab initio transport coefficients in bcc (, , , , , ) dilute alloys

L Messina, M Nastar, T Garnier, C Domain, P Olsson - Physical Review B, 2014 - APS
Defect-driven diffusion of impurities is the major phenomenon leading to formation of
embrittling nanoscopic precipitates in irradiated reactor pressure vessel (RPV) steels …

Study of static recrystallization behavior in hot deformed Ni-based superalloy using cellular automaton model

YC Lin, YX Liu, MS Chen, MH Huang, X Ma, ZL Long - Materials & Design, 2016 - Elsevier
A cellular automaton model (CA) with probabilistic state switches is developed to simulate
the microstructural evolution in a Ni-based superalloy during static recrystallization (SRX) …

Systematic electronic-structure investigation of substitutional impurity diffusion and flux coupling in bcc iron

L Messina, M Nastar, N Sandberg, P Olsson - Physical Review B, 2016 - APS
The diffusion properties of a wide range of impurities (transition metals and Al, Si, and P) in
ferritic alloys are here investigated by means of a combined ab initio–atomic diffusion theory …

Microstructural evolution and grain refinement mechanisms of a Ni-based superalloy during a two-stage annealing treatment

MS Chen, ZH Zou, YC Lin, HB Li, GQ Wang… - Materials …, 2019 - Elsevier
In authors' previous work [Mater. Charact., 141 (2018) 212–222], it was found that the
heterogeneous deformed microstructures can be replaced by the relatively homogeneous …

KineCluE: A kinetic cluster expansion code to compute transport coefficients beyond the dilute limit

T Schuler, L Messina, M Nastar - Computational Materials Science, 2020 - Elsevier
This paper introduces the KineCluE code that implements the self-consistent mean-field
theory for clusters of finite size. Transport coefficients are obtained as a sum over cluster …

[PDF][PDF] 1.18-Radiation-induced segregation

M Nastar, F Soisson - Comprehensive nuclear materials, 2012 - researchgate.net
Irradiation creates excess point defects in materials (vacancies and self-interstitial atoms),
which can be eliminated by mutual recombination, clustering, or annihilation of preexisting …

Automatic numerical evaluation of vacancy-mediated transport for arbitrary crystals: Onsager coefficients in the dilute limit using a Green function approach

DR Trinkle - Philosophical Magazine, 2017 - Taylor & Francis
A general solution for vacancy-mediated diffusion in the dilute-vacancy/dilute-solute limit for
arbitrary crystal structures is derived from the master equation. A general numerical …

Radiation induced segregation near dislocations and symmetric tilt grain boundaries in Fe-Cr alloys: A phase-field study

GFB Moladje, L Thuinet, CS Becquart, A Legris - Acta Materialia, 2022 - Elsevier
A phase-field model dedicated to dislocation climb under irradiation has been coupled to
point defects and chemical species transport equations. It allows to predict radiation induced …

Decoupling atomic diffusion degeneracy in L12 intermetallics

H Luo, W Liu, C Liang - Materials Research Letters, 2024 - Taylor & Francis
In this work, a degenerate diffusion state is identified for common L12 intermetallics in well-
defined five-frequency model (FFM) and anti-site bridge model (ASB). The relative energy …