The focus of this study is the degradation of a near pearlitic microstructure under combined mechanical and thermal loadings leading to changes in mechanical properties. More specifically, it is examined how the orientation gradients inside the pearlite colonies, affect the spheroidisation. Samples were extracted from virgin near pearlitic railway wheels and prestrained, thereafter heat treated...

Abstract This research paper mainly studied the microstructure and hardness of weld bead welding heat affected zone ultrafine grain steel after CO 2 gas-shielded welding. After normalizing quenching treatment, changes in welded joints were studied. These experimental results showed that joint was dendritic. The a mixed structure proeutectoid ferrite, side plate bainite, pearlite. overheated HAZ...

When using traditional metallographic techniques, materials scientists often make assumptions about the shape, distribution and connectivity of three-dimensional features that lie buried within the material. Recent work has shown that these assumptions can be incorrect. An approach to threedimensional analysis of microstructures is demonstrated here in three different alloy steels. Proeutectoid...

Abstract In this study, the effect of cooling rate controlled by different castings thickness ranging from 3 to 25 mm on mechanical and corrosion behavior Si–Mo ductile iron (DI) was investigated. SEM-EBSD investigations demonstrated that nodule counts, nodularity, ferrite phase increased while ferritic grain size decreased with decreasing in casting wall thickness; turn led improvements tensil...

Carbonizing phenomena from carbon-containing mold flux into ultra-low-carbon liquid steel have always been one of the important factors affecting surface quality continuous casting billets. An experimental method has adopted in this investigation to study carbonizing behavior during steel, and locations where occurs process were predicted by ANSYS Fluent numerical simulations. The results indic...