Validación de la variación de las propiedades mecánicas a la torsión del acero AISI/SAE 4140 tratado termicamente por temple a 830 °C - 860 ºC y revenido a 500 ºC.

Abstract

This document carries out the verification of the results achieved in the Laboratory of Science and Strength of materials, of torsion tests carried out on specimens (shafts), of the AISI / SAE 4140 steel material, previously tempered at 830ºC - 860ºC and tempered at 500ºC, by means of simulations carried out in the Ansys software. For this, the torsion test is first defined in the software used for AISI / SAE 4140 material shafts according to the applied regulations. Once the necessary parameters have been defined to enter the software, the characteristic data of the steel in the state of supply is collected to create the material. Before starting a finite element analysis, you need to set up the material for the designated study. The most relevant material properties involved in the test are: modulus of elasticity, Poisson's ratio, density, coefficient of expansion and thermal conductivity. It is also necessary to configure the geometry, for which the program has two design modelers linked to the “Geometry” option. The geometry was generated from the ANSYS SpaceClaim modeler and presented all the respective dimensions of a specimen for torsional testing. After the geometry is made, a mesh is generated according to the characteristics of the specimen. Once all these parameters have been defined, we proceed to simulate the torsion test on the 4140 steel material in the delivery state. Subsequently, the following torsion simulations are carried out, taking into account the parameters that vary in the material due to the heat treatments of quenching at 830ºC - 860ºC and tempering at 500ºC. With the results of the simulations, it can be seen that they are considerably close to those carried out experimentally both in stress and in unit strain.