Non-linear dynamics of the morphology at the oxide / metal interface of austenitic steels in simulated light water reactor environments and its implications for SCC initiation

Yoichi Takeda, Takayuki Sato, Daisuke Yamauchi, Tetsuo Shoji, Akio Ohji

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

Abstract

Initiation process of stress corrosion cracking (SCC) usually takes long precursor and incubation periods. It can be assumed that SCC initiation is a form of localized oxidation or oxide penetration into the metal substrate. In this investigation, apart from fundamental mechanistic studies, the oxide / metal interface morphology after the oxidation of austenitic steels were analyzed. Oxidation tests were performed using circumferential notched round bar specimens in order to study the oxidation under a high stress state. Based on the oxide / metal interface profiles obtained from cross-sectional images of the specimens, characteristic curves for oxidation localization were drawn and parameters that describe the features of oxidation localization in laboratory specimens were obtained. The trends in these localized parameters with oxidation time are compared with samples removed from operated components and a correlation to SCC initiation is discussed.

Original languageEnglish
Title of host publication15th International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors 2011
PublisherJohn Wiley and Sons Inc.
Pages393-403
Number of pages11
ISBN (Print)9781622761944
Publication statusPublished - 2011 Jan 1
Event15th International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors 2011 - Colorado Springs, CO, United States
Duration: 2011 Aug 72011 Aug 11

Publication series

Name15th International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors 2011
Volume1

Other

Other15th International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors 2011
CountryUnited States
CityColorado Springs, CO
Period11/8/711/8/11

Keywords

  • Crack initiation
  • Stress corrosion cracking
  • Surface oxidation

ASJC Scopus subject areas

  • Nuclear Energy and Engineering
  • Pollution

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