The corrosion behaviors of different weld heat-affected zones (HAZs) were investigated, comprising an API 5L X65 steel immersed in seawater with abundant native microbial community. Before tests, HAZ physical simulations performed at the peak temperatures 700 °C, 860 1000 and 1350 °C. Throughout 14 days immersion, various planktonic bacterial groups associated microbiologically influenced metab...

In this investigation, the effect of microstructural changes and phase equilibria on corrosion behavior hydrogen induced cracking (HIC) sensitivity an API X65 pipeline steel was studied. For purpose, heat treatment performed at 850 °C, 950 1050 °C 1150 to engineer desired microstructure steel. Then, evolution by optical microscopy, Field Emission Scanning Electron Microscopy (FE-SEM) equipped w...

The world's oil and gas sectors are diverse. They utilize offshore pipes to generate millions of barrels meet global energy demands. In this study we identified the critical buckling load that occurred on a cylinder shell (also known as radial buckling). Offshore pipe design must several criteria, one which is requirement for withstand external hydrostatic pressure seawater. overall calculated ...

In many astrophysical applications, the cost of solving a chemical network represented by system ordinary differential equations (ODEs) grows significantly with size network, and can often represent significant computational bottleneck, particularly in coupled chemo-dynamical models. Although standard numerical techniques complex solutions tailored to thermochemistry somewhat reduce cost, more ...

Abstract In this research, a radial basis function artificial neural network (RBF-ANN) model was developed to predict the hot deformation flow curves of API X65 pipeline steel. The results of the developed model was compared with the results of a new phenomenological model that has recently been developed based on a power function of Zener-Hollomon parameter and a third order polynomial functio...