TY - JOUR
T1 - Simulated spatial and temporal dependence of chromium concentration in pure Fe and Fe–14%Cr under high dpa ion irradiation
AU - Vörtler, K.
AU - Mamivand, M.
AU - Barnard, L.
AU - Szlufarska, I.
AU - Garner, F. A.
AU - Morgan, D.
N1 - Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2016/10/1
Y1 - 2016/10/1
N2 - In this work we develop an ab initio informed rate theory model to track the spatial and temporal evolution of implanted ions (Cr+) in Fe and Fe–14%Cr during high dose irradiation. We focus on the influence of the specimen surface, the depth dependence of ion-induced damage, the damage rate, and the consequences of ion implantation, all of which influence the depth dependence of alloy composition evolving with continued irradiation. We investigate chemical segregation effects in the material by considering the diffusion of the irradiation-induced defects. Moreover, we explore how temperature, grain size, grain boundary sink strength, and defect production bias modify the resulting distribution of alloy composition. Our results show that the implanted ion profile can be quite different than the predicted SRIM implantation profile due to radiation enhanced transport and segregation.
AB - In this work we develop an ab initio informed rate theory model to track the spatial and temporal evolution of implanted ions (Cr+) in Fe and Fe–14%Cr during high dose irradiation. We focus on the influence of the specimen surface, the depth dependence of ion-induced damage, the damage rate, and the consequences of ion implantation, all of which influence the depth dependence of alloy composition evolving with continued irradiation. We investigate chemical segregation effects in the material by considering the diffusion of the irradiation-induced defects. Moreover, we explore how temperature, grain size, grain boundary sink strength, and defect production bias modify the resulting distribution of alloy composition. Our results show that the implanted ion profile can be quite different than the predicted SRIM implantation profile due to radiation enhanced transport and segregation.
UR - http://www.scopus.com/inward/record.url?scp=84978147674&partnerID=8YFLogxK
U2 - 10.1016/j.jnucmat.2016.06.040
DO - 10.1016/j.jnucmat.2016.06.040
M3 - Article
AN - SCOPUS:84978147674
SN - 0022-3115
VL - 479
SP - 23
EP - 35
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
ER -