Navegando por Palavras-chave "Metal Matrix Composite"

Agora exibindo 1 - 1 de 1
  • Nenhuma Miniatura disponível
    Item
    Somente Metadadados
    Processamento do compósito de matriz de liga de alumínio AA6061 reforçada por nanotubos de carbono de paredes múltiplas por Equal Channel Angular Pressing (ECAP)
    (Universidade Federal de São Paulo (UNIFESP), 2019-06-21) Jimenez, Laila Ribeiro De Andrade Acevedo [UNIFESP]; Travessa, Dilermando Nagle [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    There has been increase in the need for materials that combine high mechanical resistance and low weight, foremost in aeronautical industry. Aluminum AA6061 alloys based metal matrix composites (MMC) reinforced by Multiple Walled Carbon Nanotube (MWCNT) are very interesting because they combine these properties. To optimize the distribution of the reinforcement along the matrix is indispensable to achieve the desirable properties in a composite. However, the MWCNT is formed of nanometric particles that tend to form clusters, and dissolve them to obtain a well-distributed reinforcement in the matrix can be a challenging step on the processing of the composite. ECAP (Equal Channel Angular Pressing) can be an efficient technique for producing microstructural refinement by promoting reinforcement distribution on the metal matrix when applied to composites. In this project, extruded bars of AA6061 composite reinforced with 2% MWCNT produced by powder metallurgy were successfully processed by 4 ECAP passes, using rout Bc and temperature of 200°C. ECAP produced microstructural modifications that reflected in hardness increase of 6,5%, mantainig ductility, when compared to its starting condition, as extruded (AE) bars, and yield stress of the processed composite values that were up to 388 MPa, under compression test.