Caracterização de aços por técnicas de raios X

• Autor(a) principal: Silva, Gabriel Rodrigues da
• Data de Publicação: 2019
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UERJ
• Texto Completo: http://www.bdtd.uerj.br/handle/1/7980
• topic: X-Ray Fluorescence; X-Ray Diffraction; EDS; NBS steels; Fluorescência de raio X; Difração de raio X; EDS; Aços NBS; Espectroscopia de raio X; CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA::FISICA ATOMICA E MOLECULAR::ESPECTROS MOLECULARES E INTERACOES DE FOTONS COM MOLECULAS

In this work five samples of standard steels with different chemical compositions were analyzed and defined by NBS (National Bureau Standards). Four X-ray characterization devices were used: a scanning electron microscope (SEM) with EDS (Energy Dispersive Spectrometer) coupled in its HITACHI TM3000 system, an AMPTEK X-ray spectrometer, Mini-X model, a spectrometer of BRUKER brand, model ARTAX 200 and an X-ray diffractometer of the brand BRUKER, model D2 PHASER. The characterization procedures were performed with the following National Bureau Standards: 1106, 1185, 1263, D 809b and D 837. The purpose of this work was to evaluate the methods of characterization of steels using X-ray techniques and to verify their efficiencies to characterize steels used in the most varied processes of manufacture and construction of Engineering. The results showed that the techniques have restrictions regarding ease of use and in relation to the results obtained. The combination of the equipment for greater accuracy in the analyzes proved to be an efficient way out for better results.