Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
CORRELATION BETWEEN INTERLAMELLAR SPACING AND HARDNESS OF A PERLITIC RAIL
Submission Author:
Vinicius Silva dos Reis , PA
Co-Authors:
Vinicius Silva dos Reis, Andrey Coelho das Neves, Gregory Oliveira, Emerson Prazeres, Carlos Vinícius de Paes Santos, JOSÉ MARIA DO VALE QUARESMA
Presenter: Vinicius Silva dos Reis
doi://10.26678/ABCM.COBEM2021.COB2021-2126
Abstract
The need for research to increase the efficiency of the wheel-rail system is essential for the improvement of the world's railroads. The present study seeks to characterize a hypereutectoid steel rail with pearlitic matrix as to its interlamellar spacing and hardness. The vertical pins were cut (in 5 mm increments) from the surface to a depth of 20 mm in the direction transversal to the rolling of the rail. Each position was analyzed by means of the microhardness test. The microstructural characterization of the positions was performed via a SEM. The micrographs allowed the measurements of the interlamellar spacings in order to verify which are the relationships that the microstructure has with the distance and the hardness. It was noticed that the interlamellar spacing varies along the studied direction, however in terms of variance analysis there are no significant differences between the 0 and 5mm positions and the 10 and 15mm positions. The interlamellar spacing has a linearity relationship with the distance in the transverse rolling direction, that is, the hardness and spacing followed the Hall-Petch relationship. Therefore, understanding the associated microstructural characteristics allows the development of more effective materials for the wheel-rail system.
Keywords
Rail, Pearlitic steel, Interlamellar spacing, Hall-Petch
