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Abstract

The effects of carbon traps in Fe-C alloys on matrix defects and the evolutions of matrix defects in Fe-C alloys under irradiation are investigated in this paper. The object kinetic Monte Carlo (OKMC) modeling is used to establish a bridge between the micro-computational simulation data and the macro-experimental data. The simulation results verify the evolution of the carbon (C)-vacancy (Vac) complex under ideal conditions, and at relatively low temperatures, the complex is mainly C-Vac ₂. Under the assumption of complex traps, the evolution of matrix defects in Fe-C systems under irradiation is simulated in this work. It is verified that the carbon vacancy complex has an obvious trapping effect on matrix defects, and the simulation results of evolution simulation of matrix defects in the Fe-C system under irradiation are consistent with the experimental results. Furthermore, the effective approximate parameters used in the simulation are compared and discussed. The present research can provide a basic support for the research on the evolution of iron-based alloy irradiation defects.

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Authors and contacts

Corresponding author:Lü Sha-Sha,lvss@bnu.edu.cn; Li Zheng-Cao,zcli@tsinghua.edu.cn

Funds:Project supported by Natural Science Foundation (Grant Nos. 11975135, 12005017) and the National Key R&D Program of China (Grant No. 2020YFB1901800)

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Vol. 71, Issue 16 - 2022-08-20

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