TY - GEN
T1 - 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
AU - Takeda, Yoichi
AU - Sato, Takayuki
AU - Yamauchi, Daisuke
AU - Shoji, Tetsuo
AU - Ohji, Akio
PY - 2011/1/1
Y1 - 2011/1/1
N2 - 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.
AB - 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.
KW - Crack initiation
KW - Stress corrosion cracking
KW - Surface oxidation
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M3 - Conference contribution
AN - SCOPUS:84867608502
SN - 9781622761944
T3 - 15th International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors 2011
SP - 393
EP - 403
BT - 15th International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors 2011
PB - John Wiley and Sons Inc.
T2 - 15th International Conference on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors 2011
Y2 - 7 August 2011 through 11 August 2011
ER -