Tomografia computadorizada de raios-X como tecnica de ensaios não destrutivos de materiais

AUTOR(ES)
DATA DE PUBLICAÇÃO

1997

RESUMO

X-ray computed tomography (XCT), originally developed for medical purposes is becoming increasingly applied to several applications where it is necessary the interpretation of the internal structure of an object nondestructively. The present work shows the application of this technique to nondestructive testing using materiaIs and components of different density and geometry, with simulated and real defects tested in a medical scanner. Characterization of electrochemical filters used to remove contamination agents (in this case, zinc) in industrial effluents, by XCT technique is also described. Digital image processing have been used (software Khoros) for defects characterization, determining the attenuation coefficient in regions of interest and measuring parameters like area and perimeter. Digital filtering operations have been applied for beam hardening correction in metallic materiaIs images, mainly aluminum. Due its qualitative and quantitative nature, XCT technique established to be a promising tool of nondestructive materiaIs evaluation and this work emphasizes its applicability through digital image processing

ASSUNTO(S)

tomografia computadorizada nondestructive testing testes não-destrutivos image processing x-rays processamento de imagens - tecnicas digitais raios x computed tomography

ACESSO AO ARTIGO

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