Microstructure and Tensile Properties of ODS-310 Austenitic Steel

Yin Chenxin; Jia Haodong; Zhou Zhangjian; Zheng Wenyue

doi:10.13832/j.jnpe.2023.05.0259

Volume 44 Issue 5

Oct. 2023

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Yin Chenxin, Jia Haodong, Zhou Zhangjian, Zheng Wenyue. Microstructure and Tensile Properties of ODS-310 Austenitic Steel[J]. Nuclear Power Engineering, 2023, 44(5): 259-266. doi: 10.13832/j.jnpe.2023.05.0259

Citation:

Yin Chenxin, Jia Haodong, Zhou Zhangjian, Zheng Wenyue. Microstructure and Tensile Properties of ODS-310 Austenitic Steel[J]. Nuclear Power Engineering, 2023, 44(5): 259-266. doi: 10.13832/j.jnpe.2023.05.0259

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Microstructure and Tensile Properties of ODS-310 Austenitic Steel

doi: 10.13832/j.jnpe.2023.05.0259

1.
School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
2.
National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing, 100083, China

Received Date: 2022-11-22
Rev Recd Date: 2023-01-04
Publish Date: 2023-10-13

Abstract

Abstract

In order to provide reliable nuclear fuel cladding materials for supercritical water-cooled reactors, ODS-310 austenitic steel with ultrafine grains and a large number of dispersed nano-oxide particles was prepared by mechanical alloying (MA) and hot isostatic pressing (HIP). The microstructure of the material after different heat treatment was analyzed by scanning electron microscopy (SEM), energy dispersive spectrometer (EDS) and transmission electron microscopy (TEM), and its tensile properties were tested. The results show that the dispersion strengthening particles in the material are spherical and mainly distributed in the grain and at the grain boundary. The average size is below 10 nm. It can be determined as Y₂Al₅O₁₂ by composition analysis and high resolution calibration. The grain structure of the sample can be obviously regulated by hot rolling plastic deformation combined with heat treatment. After heat treatment at 1100℃/120 h, the size and composition of the dispersed particles remain stable, and the particles have obvious pinning effect on dislocations. The prepared ODS-310 austenitic steel has high tensile strength and good thermal stability. The tensile strength of the samples before and after heat treatment at different temperatures is about 850 MPa, and the plasticity of the samples after heat treatment at 1100°C/120 h is significantly improved. This study shows that the tensile properties of ODS-310 austenitic steel are good, and the grain structure can be regulated by heat treatment. It can provide valuable data support for the study of ODS austenitic steel properties.
- Nano-oxide dispersion strengthened,
- ODS-310 Austenitic steel,
- Microstructure,
- Tensile properties

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References(17)

References

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