Strain rate dependence of plastic flow behaviour of HSLA-100 steel in seawater during cathodic charging of hydrogen

Abstract

The effect of strain rate on the true tensile stress-strain plots of HSLA-100 steel in hydrogen environment has been studied. The analysis of the result is based on the most commonly used expression to represent plastic flow behaviour of engineering alloys. Experimental data generated at different cathodic potentials and strain rates in the plastic regime of the true stress-strain curve have been used to build a model. True stress-strain plots obtained from this model describe experimental data fairly well. Strain hardening exponent has been found to be independent of applied potential and strain rate. Additional model parameters are needed to describe their effects on the plastic flow behaviour of the steel in seawater.