Measurement of Crack Growth Rate of Alloy X-750 Based on DCPD Method

Du Donghai; Zhang Lefu; Chen Kai; Yu Lun; Shi Xiuqiang; Xu Xuelian

doi:10.13832/j.jnpe.2014.04.0163

Volume 35 Issue 4

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Du Donghai, Zhang Lefu, Chen Kai, Yu Lun, Shi Xiuqiang, Xu Xuelian. Measurement of Crack Growth Rate of Alloy X-750 Based on DCPD Method[J]. Nuclear Power Engineering, 2014, 35(4): 163-167. doi: 10.13832/j.jnpe.2014.04.0163

Citation:

Du Donghai, Zhang Lefu, Chen Kai, Yu Lun, Shi Xiuqiang, Xu Xuelian. Measurement of Crack Growth Rate of Alloy X-750 Based on DCPD Method[J]. Nuclear Power Engineering, 2014, 35(4): 163-167. doi: 10.13832/j.jnpe.2014.04.0163

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Measurement of Crack Growth Rate of Alloy X-750 Based on DCPD Method

doi: 10.13832/j.jnpe.2014.04.0163

1. Corrosion Laboratory for Nuclear Power Materials, Shanghai Jiao Tong University, Shanghai, 200240, China;
2. Shanghai Key Laboratory for Nuclear Power Engineering, Shanghai, 200233, China

Received Date: 2013-04-02
Rev Recd Date: 2013-09-27

Available Online: 2025-02-15

Abstract

Abstract

This paper studies the fatigue cracking in air and stress corrosion cracking（SCC） in high temperature and high pressure water of alloy X-750 respectively based on direct current potential drop（DCPD） method. The testing method using compact tensile specimens is briefly described, and the mechanism and process that control the crack tip chemistry are discussed according to the slip-film rupture-oxidation model. The effects of dissolved oxygen and SO₄^2- impurities on crack tip chemistry are also discussed.
- DCPD,
- X-750,
- SCC,
- Dissolved Oxygen,
- SO₄^2-Impurities