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Automatic Segmentation of the Secondary Austenite-phase Island Precipitates in ...
Victor H. C. Albuquerque; Rodrigo Y. M. Nakamura; João P. Papa; Cleiton C. Silva; João Manuel R. S.TavaresDuplex and superduplex stainless steels are class of materials of a high importance for engineering purposes, since they have good mechanical properties combination and also are very resistant to corrosion. It is known as well that the chemical composition of such steels is very important to maintain some desired properties. In the past years, some works have reported that gama 2 precipitation improves the toug...
Application of optimum-path forest classifier for synthetic material porosity s...
Victor H. C. Albuquerque; João P. Papa; Alexandre X. Falcão; Pedro P. R. Filho; João Manuel Ribeiro da Silva TavaresThis paper presents a new application and evaluation of the Optimum-Path Forest (OPF) classifier to accomplish synthetic material porosity segmentation and quantification obtained from optical microscopic images. Sample images of a synthetic material were analyzed and the quality of the results was confirmed by human visual analysis. Additionally, the OPF results were compared against two different Support Vect...
Drilling of carbon fibre reinforced laminates : a study
Luís M. P. Durão; Daniel J. S. Gonçalves; João Manuel R. S. Tavares; Victor H. C. Albuquerque; A. Torres Marques; A. M. BaptistaThe distinguishing characteristics of carbon fibre reinforced laminates, like low weight, high strength or stiffness, had resulted in an increase of their use during the last decades. Although parts are normally produced to "near-net" shape, machining operations like drilling are still needed. In result of composites non-homogeneity, this operation can lead to delamination, considered the most serious kind of d...
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