in this study, the changes in microstructure of hp-nb cast heat resistant steel after 8 years of service at high temperatures were investigated. study of microstructure using optical microscopy (om) and scanning electron microscopy (sem) equipped with an energy dispersive spectrometry (eds) showed that the microstructure of this steel in as-cast condition includes an austenitic matrix, and that...

In this paper, the fatigue behavior of titanium microalloyed beam steels were studied by high cycle test and crack growth rate test. The effect Mg addition on in steel was systematically analyzed. According to experimental results, magnesium can effectively modify inclusions reducing size Al2O3 TiN promoting formation finer complex with a MgO·Al2O3 core high-strength steel. number had far less ...

   A low carbon Al-killed Ti-added steel was produced in Mobarakeh Steel Complex in Iran. Mechanical properties and microstructural characterizations of steel in the as-cast, hot-rolled, cold-rolled and annealed conditions are presented. Dilatometery tests were carried out to measure the finishing and annealing temperatures of steel. It was found that the addition of small amounts of Ti increas...