Time Series Analysis Associated to Hydrogen Effect in Hydrided Zircaloy-4 SEM Micrographs

摘要

The Zircaloy-4 tubes occlude hydrogen during manufacture and during operational service in the presence of the high-temperature water used to extract heat from the nuclear reactor.The hydrogen precipitates in zirconium alloys as platelets of hydride.The SEM micrographs of the surface of the hydrided Zircaloy-4 samples have been analyzed.In this paper we introduce some new algorithms and first develop a computer application,most of them based on the time-series method.Then we use the phase space embedding technique to reconstruct the attractor and to compute the autocorrelation dimension.