A model of homogeneous semicoherent interphase boundary for heterophase precipitates in substitution alloys under irradiation

TL;DR

This paper presents a model for the behavior of semicoherent interphase boundaries in heterophase precipitates under irradiation, focusing on defect processes and precipitate size evolution, validated against experimental data on ferritic steel.

Contribution

It introduces a homogeneous semicoherent boundary model that describes defect absorption, migration, and precipitate size changes under irradiation in substitution alloys.

Findings

Model accurately predicts precipitate size evolution under irradiation.

Results align with experimental data on ferritic ODS steel.

Provides insights into defect dynamics at interphase boundaries.

Abstract

The model of homogeneous semicoherent interphase boundary describes the processes of absorption and thermoactivated migration of irradiation-produced inequilibrium point defects at a semicoherent boundary between a heterophase precipitate and a substitution solid solution. Within this model the kinetics of evolution of the sizes of precipitates of constant chemical composition under irradiation is investigated. The results obtained are compared to the experimental data [I. Monnet et al., J. Nucl. Mater. 335 (2004) 311] for the ferritic ODS steel EM10+MgO under electron irradiation.