A influência da temperatura no comportamento plástico do alumínio extrudado

Abstract

It is well known that the magnitude of stress exerted on a given metallic component is directly correlated with temperature during the compression process. This study investigated the plastic behavior of extruded aluminum by conducting upsetting tests at different temperatures. Through true stress vs. strain curves, it was possible to characterize the material's deformation behavior under varying conditions and estimate the forces required for deformation. The tests demonstrated a direct relationship between temperature and the resistance to deformation of the specimen. Four compression tests were performed, covering distinct temperature ranges: cold (ambient temperature ~25°C), 110-150°C, 200-240°C, and approximately 400°C. This work characterized the plastic behavior of the extruded aluminum alloy from the 6000 series and determined the equations that describe the plastic behavior under different test conditions. Additionally, computational simulation of the upsetting test was carried out using QFORM UK software to compare with experimental data. The simulations of cold tests showed good correlation with the actual curve, indicating that the software reproduces experimental conditions similarly. Keywords: extruded aluminum, aluminum alloy 6000 series, upsetting test, mechanical forming, QForm UK simulation.