In this study, the changes in microstructure and mechanical properties during isothermal heat treatment of cast steel before after hot deformation were investigated using medium-carbon with low alloy content. The microstructural characteristics hot-rolled under heat-treatment conditions examined optical microscopy scanning electron conjunction backscatter diffraction. variation was evaluated Ro...

We report an attempt at increasing the thermal stability of nanocrystalline bainite to tempering heat-treatments, by enhancing the silicon concentration of the alloy. Validation experiments have been conducted using synchrotron X-radiation during tempering heat treatment. It is found that the change in alloying successfully stabilises the austenite at elevated temperatures by retarding cementit...

The boron-free S700MC steel is usually produced by exploiting the properties of a ferrite-bainite mixed microstructure formed coiling strips at temperature about 450?C, i.e.below bainite starting temperature. With aim further enhancing mechanical 6 to 10 mm thick strips, industrial tests were carried out 600?C promote formation structure ferrite and carbides, which also acceptable for this type...

Martensitic and nanobainite transformations are studied in situ a low alloyed, high-Si steel by using HEXRD, combined with dilatometry SEM observations, considering the same composition austenitization conditions. The martensitic microstructure presents mixed lath-plate morphology large scatter of sizes whereas bainite shows finer laths more uniform sizes. Recently introduced methods used to tr...

In this work, the effects of post weld heat treatment (PWHT) on microstructure and mechanical properties functionally gradient materials (FGM) was investigated. The FGM consisted five different layers which were mixtures austenitic stainless steel (type 316L) ferritic (LAS). ratio type 316L LAS powder in each deposition layer 100:0, 75:25, 50:50, 25:75, 0:100. samples successfully fabricated wi...