Caracterização estrutural por difração de elétrons retroespalhado (EBSD) de uma liga Cr29,5Co29,5Ni35Al4Ti2 com efeito TWIP

Abstract

High Entropy alloys have elemental constituents in the same molar quantity, which can generate several properties, characteristics, materials, with applications in sectors that require high performance in aggressive environments. For an assessment of the microstructure referring to the presence of the TWIP effect (deformation twins), one possibility is to analyze the material by backscattered electron diffraction (EBSD) associated with a scanning electron microscope (SEM), a technique that is very widespread in the crystallographic and microstructural characterization of materials. In this context, the present study aimed to characterize the Cr29,5Co29,5Ni35Al4Ti2 alloy by EBSD, detailing the entire process of elucidating the steps to obtain the best Kikuchi pattern, also evaluating the presence of evidence, in this case, deformation twins. through SEM images, crystallographic maps, and crystalline disorientation curves, as which results were not satisfactory, due possibly to the resolution of the equipment used,no controlling the spot size, or even the absence of the TWIP effect in the league.