Study on Stress Corrosion Cracking Sensitivity of CrNiMoV Steam Turbine Rotor Steels-Reference-Cited by-同舟云学术

Study on Stress Corrosion Cracking Sensitivity of CrNiMoV Steam Turbine Rotor Steels

Published:2019-03 Issue: Volume:795 Page:102-108
ISSN:1662-9795
Container-title:Key Engineering Materials
language:
Short-container-title:KEM

Author:

Lin Shu Xian¹,Huang Yu Hui¹,Xuan Fu Zhen¹,Tu Shan Tung¹

Affiliation:

1. East China University of Science and Technology

Abstract

The stress corrosion sensitivities of 25Cr2Ni2MoV, 26NiCrMoV10-10 and 30Cr2Ni4MoV low-pressure rotor steels in simulated nuclear steam turbine operation condition were investigated by slow strain rate test (SSRT), and the stress corrosion cracking (SCC) mechanisms were studied by optical microscope (OM), scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS). Results revealed that the SCC sensitivity of 25Cr2Ni2MoV steel was highest in 3.5wt.%NaCl solution at 180°C, while the SCC sensitivity of 26NiCrMoV10-10 steel and 30Cr2Ni4MoV steel are similar. The SCC sensitivity of CrNiMoV steam turbine rotor steels could be decreased by the increase of Ni element and the decline of mechanical intensity. Cracks initiate from metal surface and then propagate to the inner metal, which showed a form of transgranular cracking.

Publisher

Trans Tech Publications, Ltd.

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

Link

https://www.scientific.net/KEM.795.102.pdf

Reference15 articles.

1. O. Jonas, L. Machemer, Steam turbine corrosion and deposits problems and solutions, Proceedings of the Thirty-seventh Turbomachinery Symposium (2008) 211-228.

2. G. C. JIAO, Analysis of stress corrosion cracking and safety assessment for blade groove of nuclear low-pressure turbine rotor, Shanghai Jiao Tong University (2015).

3. X. Liu, Y. X. Zhong, Q. X. Ma, C. L. Yuan, Development of low-pressure rotor technology for nuclear steam turbine, China Metal Forming Equipment & Manufacturing Technology 44 (2009) 13-18.

4. S. A. Shipilov, Solving some key failure analysis problems using advanced methods for materials testing, Engineering Failure Analysis 14 (2007) 1550-1573.

5. J. G. Parker, M. A. Sadler, Stress corrosion cracking of a low alloy steel in high purity steam, Corrosion Science 1 (1975) 57-63.

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