Effect of fatigue damage on stress corrosion cracking sensitivity of nuclear steam turbine welded joint

HUANG Yuhui; SI Xiaofa; WENG Shuo; XUAN Fuzhen

doi:10.12073/j.hjxb.20191113001

TRANSACTIONS OF THE CHINA WELDING INSTITUTION > 2020 > 41(4): 12-19, 37. > DOI: 10.12073/j.hjxb.20191113001

HUANG Yuhui, SI Xiaofa, WENG Shuo, XUAN Fuzhen. Effect of fatigue damage on stress corrosion cracking sensitivity of nuclear steam turbine welded joint[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2020, 41(4): 12-19, 37. DOI: 10.12073/j.hjxb.20191113001

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Effect of fatigue damage on stress corrosion cracking sensitivity of nuclear steam turbine welded joint

1.
Key Laboratory of Pressure Systems and Safety, Ministry of Education, East China University of Science and Technology, Shanghai, 200237, China
2.
University of Shanghai for Science and Technology, Shanghai, 200093, China

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Received Date: November 12, 2019
Available Online: July 26, 2020

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Abstract

Abstract

The effect of fatigue damage on the stress corrosion cracking susceptibility of nuclear steam turbine welded rotor was studied by slow strain rate test (SSRT). The mechanism of fatigue damage on stress corrosion cracking susceptibility and secondary crack of nuclear steam turbine welded joint was discussed by scanning electron microscope (SEM). The results show that fatigue damage enhances the stress corrosion cracking susceptibility of welded joints. In addition, the fatigue damage increased the plasticity of the samples in the air and decreased the plasticity in the corrosion environment, furthermore, it affected the formation and propagation of the secondary cracks in the samples.
- nuclear steam turbine rotor,
- welded joint,
- stress corrosion,
- slow strain rate test

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References (27)

References

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Effect of fatigue damage on stress corrosion cracking sensitivity of nuclear steam turbine welded joint