Atomic Simulation of the Interaction between Dislocation Line and Ferrite/Iron Oxide Interface

Zhu Bida; Yu Xinyang; Li Zheng; He Manru

doi:10.13832/j.jnpe.2022.S2.0028

Volume 43 Issue S2

Dec. 2022

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Zhu Bida, Yu Xinyang, Li Zheng, He Manru. Atomic Simulation of the Interaction between Dislocation Line and Ferrite/Iron Oxide Interface[J]. Nuclear Power Engineering, 2022, 43(S2): 28-32. doi: 10.13832/j.jnpe.2022.S2.0028

Citation:

Zhu Bida, Yu Xinyang, Li Zheng, He Manru. Atomic Simulation of the Interaction between Dislocation Line and Ferrite/Iron Oxide Interface[J]. Nuclear Power Engineering, 2022, 43(S2): 28-32. doi: 10.13832/j.jnpe.2022.S2.0028

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Atomic Simulation of the Interaction between Dislocation Line and Ferrite/Iron Oxide Interface

doi: 10.13832/j.jnpe.2022.S2.0028

Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu, 610213, China

Received Date: 2022-08-18
Rev Recd Date: 2022-10-18
Publish Date: 2022-12-31

Abstract

Abstract

Iron oxide is a common surface oxide and internal precipitate of nuclear grade steel containing ferrite phase (such as low alloy steel and ferrite-martensite dual phase steel) under high temperature. A correct understanding of the influence of iron oxide on the micro-deformation mechanism of steel is of great significance to the safety evaluation of advanced nuclear energy systems with higher operating temperatures. In view of this, the effect of temperature on the interaction between edge dislocations in ferrite and ferrite/iron oxide two-phase interface is studied by molecular dynamics method. The calculation results show that in the temperature range of 10~900 K, the edge dislocations can not penetrate the ferrite/oxide interface, but only cause a certain degree of shear deformation between the two phases. With the increase of temperature, the stress concentration near the dislocation-interface contact point increases, and the shear deformation between the interfaces also increases. The above results have certain guiding significance for fracture failure analysis of low alloy steel and ferrite-martensite dual phase steel under high temperature environment.
- Molecular dynamics,
- Surface oxide,
- Microplastic mechanism,
- Wustite,
- Dislocation-interface interaction

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References(9)

References

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