The oil and gas industry is involved with severe corrosive/sour environmental conditions due to H2S, CO2, moisture content. National Association of Corrosion Engineers (NACE) has developed standards enable users select suitable materials for given sour which utilize laboratory testing. A failed piping sample (API-5L-X65) was removed from a pipeline after 15 years service. Optical microscopy use...

Oil and gas pipelines manufactured from API-5L Grade X65 steel are generally subjected to cyclic loading their internal surfaces frequently exposed corrosive sour fluids. Exposure of these environments often leads localized corrosion (pitting) decreased fatigue life. Corrosion pits geometrical discontinuities that may promote cracking by acting as stress raisers. In order optimize asset inspect...

Johnson-Cook constitutive equation is one of the most famous constitutive equations that have ever been developed to model the hot deformation flow curves of different materials. This equation is a predefined model in the traditional finite element codes to describe the material behavior in applications such as simulating the manufacturing processes. In this work, two different genetic algorith...