Effect of Manganese on the Microstructure and TiC Precipitation in Hypoeutectoid Steel

Abstract

In the present article, influence of manganese on the size and shape of the precipitated TiC crystals by in-situ reaction with varying amounts of manganese in hypoeutectoid steel are presented. Manganese was added up to 6.0% in steps of 1.5%, titanium was fixed at 4%, and carbon at 1.84%. The obtained specimens were examined by using optical, scanning electron microscope (SEM), and X-ray diffraction (XRD) analysis. Tensile properties were evaluated using the ASTM E8 M standard. The microstructure results showed that the in-situ TiC carbides are homogeneously distributed in the metal matrix. Based on the microstructure and XRD pattern, in-situ TiC carbides were identified. The precipitated in-situ TiC in molten Fe-Mn-C alloy is explained by constructing three-dimensional iron rich Fe-Mn-TiC phase diagram. In Fe-Mn-TiC composite, varying manganese content increases the Young's modulus, ultimate tensile strength, and percentage elongation.