Browsing by Author "Martins, J."
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- A Bacia do Algarve : estratigrafia, paleogeografia e tectónicaPublication . Terrinha, Pedro; Rocha, Rogério Bordalo; Rey, Jacques; Cachão, Mário; Moura, Delminda; Roque, Cristina; Martins, J.; Valadares, Vasco; Cabral, João; Azevedo, Maria do Rosário; Barbero, Luis; González Clavijo, Emilio José; Dias, Ruben Pereira; Matias, H.; Madeira, J.; Silva, C. M.; Munhá, José; Rebêlo, Luís Pina; Ribeiro, C.; Vicente, J.; Gonçalves, João Noiva; Youbi, N.; Bensalah, M. K.
- Characterization of smart MARFOS NiTi shape memory alloysPublication . Neves, Filipe; Fernandes, F. M. Braz; Martins, J.; Correia, J.B.; Oliveira, M.; Gaffet, E.; Wang, T. Y.; Lattemann, M.; Suffner, J.; Hahn, H.In the present study, structural characterization of NiTi smart shape memory al-loys (SMAs), produced by an alternative powder metallurgy approach named mechanically ac-tivated reactive forging (MARFOS), was carried out by means of transmission electron micros-copy (TEM), scanning electron microscopy (SEM) and X-ray diffraction (XRD). It was observed that MARFOS materials had a multiphase nanocrystalline structure. In addition, the transformation behaviour associated with the shape memory effect of the MARFOS aged mate-rials was studied with differential scanning calorimetry (DSC). Multiple-step martensitic trans-formations could be observed in aged materials.