Effect of Thermal Aging on Mechanical Properties of Silicon-containing Ferritic/Martensitic Steel

Liu Xiao; Wang Hui; Xiao Jun; Sun Yongduo; Liu Shuaiyang; Zhang Jinyu

doi:10.13832/j.jnpe.2023.S1.0147

Volume 44 Issue S1

Jun. 2023

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Article Navigation > Nuclear Power Engineering > 2023 > 44(S1): 147-151

Liu Xiao, Wang Hui, Xiao Jun, Sun Yongduo, Liu Shuaiyang, Zhang Jinyu. Effect of Thermal Aging on Mechanical Properties of Silicon-containing Ferritic/Martensitic Steel[J]. Nuclear Power Engineering, 2023, 44(S1): 147-151. doi: 10.13832/j.jnpe.2023.S1.0147

Citation:

Liu Xiao, Wang Hui, Xiao Jun, Sun Yongduo, Liu Shuaiyang, Zhang Jinyu. Effect of Thermal Aging on Mechanical Properties of Silicon-containing Ferritic/Martensitic Steel[J]. Nuclear Power Engineering, 2023, 44(S1): 147-151. doi: 10.13832/j.jnpe.2023.S1.0147

Citation:

Liu Xiao, Wang Hui, Xiao Jun, Sun Yongduo, Liu Shuaiyang, Zhang Jinyu. Effect of Thermal Aging on Mechanical Properties of Silicon-containing Ferritic/Martensitic Steel[J]. Nuclear Power Engineering, 2023, 44(S1): 147-151. doi: 10.13832/j.jnpe.2023.S1.0147

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Effect of Thermal Aging on Mechanical Properties of Silicon-containing Ferritic/Martensitic Steel

doi: 10.13832/j.jnpe.2023.S1.0147

1.
Science and Technology on Reactor Fuel and Materials Laboratory, Nuclear Power Institute of China, Chengdu, 610213, China
2.
State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, 710049, China

Received Date: 2022-12-15
Rev Recd Date: 2023-03-13
Publish Date: 2023-06-15

Abstract

Abstract

Four kinds of 9Cr- ferritic/martensitic (F/M) steels with different Si contents were heat aged at 550°C (the longest time was 5000 h), and their mechanical properties such as yield strength (R_p0.2), tensile strength (R_m) and elongation (A) were tested. The relationship between microstructure and mechanical properties was studied by means of scanning electron microscope/energy dispersive spectrometer (SEM/EDS) and transmission electron microscope (TEM). The results show that the strength of 9Cr-F/M steel can be improved by adding a small amount of Si, and when the Si content (mass fraction) is 0.7%, R_p0.2 and R_m reach the maximum, but the addition of Si will promote Laves phase precipitation. Aging time (t) has a significant effect on the plasticity of 9Cr-F/M steel. When t < 2500 h, the plasticity of 9Cr-F/M steel has little change, but when the Si content is increased to 1.0%, the plasticity decreases greatly after aging for 5000 h, which is attributed to the precipitation and growth of Laves phase at the grain boundary.
- Ferritic/Martensitic (F/M) Steel,
- Thermal aging,
- Mechanical properties,
- Microstructure,
- Laves phase

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References(13)

References

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