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...
Estudo da viabilidade do uso de fluxo e plasma de N2 na nitretação da liga Sm2F...
Leite, Josinaldo PereiraTese (Doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico.; Estudo comparativo dos processos de nitretação convencional, por plasma e por fluxo de gás do Sm2Fe17. As propriedades magnéticas e as mudanças microestruturais da liga foram investigadas através das seguintes técnicas: magnetômetro de amostra vibrante, raios-x, microscopia ótica, e eletrônica de varredura. As variáveis de monitoram...