a neural network with feed forward topology and back propagation algorithm was used to investigate the effect of composition on mechanical properties in api x65 microalloyed steel (used in manufacturing of large diameter pipes). experimental data was obtained by cutting 100 specimens from pipes manufactured in industrial scale (with similar heats and manufacturing processes). the chemical analy...

This research studies the effect of normalization on ductility and corrosion resistance API 5L X65 pipe. Normalization conducted at a temperature 900 °C with holding time 30, 60, 90, 120, 150 minutes, followed by cooling down to room using an external air. Corrosion testing normalized specimens was performed seawater as corrosive environment, -and were also tested for microhardness determine th...

The propagation of localized corrosion on API 5L X65 carbon steel in hydrogenocarbonated solution containing chloride ions was monitored during long immersion times by electrochemical noise (EN) measurements ZRA mode. Monitoring from the EN amplitude is possible but interpreting potential and current transients after made difficult different processes (metastable or stable pits, crevices, produ...