| The primary objective was to develop a model for the effects of the range of stress intensity factor (;An experimental study was performed to determine the crack growth (CG) response of a HY-130 steel in de-aerated 3.5% NaCl solution, as a function of ;The crack growth rate (CGR) exhibited an exponential-like dependence on 1/f, with saturation occurring as the frequency decreased. Increases in ;A modeling framework was developed to link the chemical and mechanical processes occurring at the crack-tip. ECGR was assumed to result from hydrogen embrittlement was controlled by the rate of the electrochemical surface reactions.;A model for the CG response, as a function of f and T, was developed based on the kinetic response of the transient surface reactions. The CG response is related to the charge transferred during the transient reactions, which explains the frequency and temperature dependence in terms of reaction kinetics and time.;A model for the CGR magnitude, as a function of K... |
