3 documents found, page 1 of 1
Spinodal decomposition mechanism study on the duplex stainless steel UNS S31803...
Albuquerque, Victor Hugo Costa de; Silva, Edgard de Macedo; Leite, Josinaldo Pereira; Moura, Elineudo Pinho de; Freita, Vera Lúcia de AraújoThis work, focuses on the spinodal decomposition mechanism study on the duplex stainless steel duplex UNS S31803, composed by austenite (c) and ferrite (a) phases, at 425 C and 475 C temperatures by ultrasonic speed measurements. This temperature range is responsible for the transformation mechanism of ainitial phase to a phases (poor in chromium) and a0 (rich in chromium) by spinodal decomposition. The techniq...
Phase transformations evaluation on a UNS S31803 duplex stainless steel based o...
Silva, Edgard de Macedo; Albuquerque, Victor Hugo Costa de; Leite, Josinaldo Pereira; Varela, Antonio Carlos Gomes; Moura, Elineudo Pinho deDuplex stainless steel presents special mechanical properties such as, for example, mechanical and corrosion strength, becoming competitive in relation to the other types of stainless steel. One of the great problems of duplex stainless steel microstructural changes study is related to embrittlement above 300 ◦C, with the precipitation of the phase occurring over the ferritic microstructure. Aiming to character...
Sistema de segmentação de imagens para quantificação de microestruturas em meta...
Albuquerque, Victor Hugo Costa de; Cortez, Paulo César; Alexandria, Auzuir Ripardo de; Aguiar, Willys Machado; Silva, Edgard de MacedoDigital Image Processing is an increasing expansion area in some field of application that uses the interpretation of images as tool. Quantitative Metallography area applied to Materials Sciences uses this technique for characterization of phase volumetric fractions, grain size, inclusion distribution determination and other parameters that influence the properties of the materials. The present paper has, as ma...