Avaliação da decomposição espinodal em aços duplex sem deformação e com deformação plástica

Abstract

This study aimed to investigate the phenomenon of spinodal decomposition in duplex stainless steel samples 2304 and 2205 under as-received conditions (non-deformed), cold-rolled, and subjected to an aging process at 500°C for 24 hours and 48 hours. Spinodal decomposition is a relevant microstructural process that affects the mechanical properties of these materials.

To achieve this objective, detailed analyses of the samples were performed using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). These techniques enabled the observation of microstructural changes in the samples, including the formation of precipitated phases resulting from spinodal decomposition.

The mechanical properties of the samples were assessed through tensile tests to determine how thermal aging affects the strength and ductility of the materials.

The results of this study provided valuable insights into the relationship between spinodal decomposition and the mechanical properties of duplex stainless steels 2304 and 2205, particularly under different processing and aging conditions. This understanding is crucial for the development and improvement of these materials in applications that demand high mechanical strength and corrosion resistance.