Effects of electrochemical potential on crack growth rate of 316L weld haz and weld metal in 288°C pure water

Zhanpeng Lu, Tetsuo Shoji, Yoichi Takeda, Yuzuru Ito, Akira Kai, Nobuhisa Tsuchiya

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

The SCC growth rates of 316L weld heat-affected zone (HAZ) and weld metal materials in 288°C pure water were measured. The effects of loading mode and dissolved oxygen on crack growth rate (CGR) were experimentally quantified. Typical intergranular SCC was found in the HAZ specimen, and interdendritic SCC was identified in the weld metal specimen. The HAZ specimen and the weld metal specimen showed quite a similar response to the applied loading modes and the water chemistry, even though their absolute CGR values are different. The crack growth rates under trapezoidal loading are moderately higher than those under constant loading. Switching from the oxygen-bearing water to the hydrogen-bearing water drastically decreased the electrochemical potential and CGR. A time-lag period for crack growth was observed after switching the hydrogenated water back to the oxygen-bearing water, where CGR was low even after the dissolved oxygen concentration and the electrochemical potential had become high.

Original languageEnglish
Title of host publicationProceedings - CIS Workshops 2007, 2007 International Conference on Computational Intelligence and Security Workshops, CISW 2007
Pages1767-1782
Number of pages16
Volume3
Publication statusPublished - 2007 Dec 1
Event13th International Conference on Environmental Degradation of Materials in Nuclear Power Systems 2007 - Whistler, BC, Canada
Duration: 2007 Apr 192007 Apr 23

Other

Other13th International Conference on Environmental Degradation of Materials in Nuclear Power Systems 2007
CountryCanada
CityWhistler, BC
Period07/4/1907/4/23

ASJC Scopus subject areas

  • Nuclear Energy and Engineering
  • Safety, Risk, Reliability and Quality
  • Materials Science(all)

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  • Cite this

    Lu, Z., Shoji, T., Takeda, Y., Ito, Y., Kai, A., & Tsuchiya, N. (2007). Effects of electrochemical potential on crack growth rate of 316L weld haz and weld metal in 288°C pure water. In Proceedings - CIS Workshops 2007, 2007 International Conference on Computational Intelligence and Security Workshops, CISW 2007 (Vol. 3, pp. 1767-1782)