Application of rate theory modeling to cluster evolution in binary Fe-Cu alloys
Application of rate theory modeling to cluster evolution in binary Fe-Cu alloys
Birkenheuer, U.; Bergner, F.; Ulbricht, A.; Gokhman, A.; Almazouzi, A.
A rate theory model for the simulation of the irradiation-induced time-evolution of Cu-rich precipitates in Fe-Cu model alloys is presented which takes into account that precipitate clusters are mixed Cu-vacancy aggregates by explicitly allowing the defect clusters to absorb vacancies. The resulting Vacancy-Coupled Copper Clustering (V3C) model is calibrated on a series of SANS experiments on two different Fe-Cu model alloys neutron-irradiated at four different doses. Quantitative agreement with the SANS experiments could be achieved by introducing a dependence of the Fe-Cu interface energy on the amount of vacancies in the mixed precipitate clusters. This energy is a function of the weight-percentage of Cu in the iron matrix. An analytic expression for this dependence is suggested.
Keywords: rate theory; percipitation; Fe-Cu model alloys; SANS experiments; neutron irradiation; irradiation damage; ageing of steels
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Contribution to HZDR-Annual report
Wissenschaftlich-Technische Berichte / Helmholtz-Zentrum Dresden-Rossendorf; FZD-501 Dezember 2008, 70-76
ISSN: 1437-322X
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Permalink: https://www.hzdr.de/publications/Publ-12155