Abstract

BEJAR-GOMEZ, L.; MEDINA-FLORES, A.  and  MARTINEZ-SANCHEZ, R.. Caracterización de precipitados mediante microscopía electrónica de transmisión de alta resolución en aceros microaleados. Rev. LatinAm. Met. Mat. [online]. 2003, vol.23, n.1, pp.59-62. ISSN 0255-6952.

Abstract     The aim of this research work is to study and characterize precipitates in a structural microalloyed steel by transmission electron microscopy and analysis by high resolution (HRTEM). Microalloyed steel with titanium was produced by casting in an electrical induction oven of 25 Kgs. capacity. Carbon content in steel was less than 0.1 %. Afterwards the steel was processed thermomechanically at an starting temperature of 1150 °C with a thickness reduction of 80% at a finishing temperature of 850 °C. This work shows what precipitates are present in steel, the type of precipitates and their morphology. Analysis by transmission electron microscopy of high resolution (HRTEM) was applied to chemical analysis of precipitate region and of the matrix. Spectroscopy of dispersive energy was applied too (STEM-EDS). Particules of precipitates of Ti (CN) were found with a circular morphology and size of 10 nm or less.

Keywords : Microalloyed steel; precipitates; transmission; electron microscopy.