| Journal: | Materials research |
| Database: | PERIÓDICA |
| System number: | 000312906 |
| ISSN: | 1516-1439 |
| Authors: | Nascimento, Maria Marony Sousa Farias1 Rocha-Neto, Jose Sergio da Lima, Antonio Marcus Nogueira de Araujo, Carlos Jose de2 |
| Institutions: | 1Universidade Federal de Campina Grande, Departamento de Engenharia Eletrica, Campina Grande, Paraiba. Brasil 2Universidade Federal de Campina Grande, Departamento de Engenharia Mecanica, Campina Grande, Paraiba. Brasil |
| Year: | 2006 |
| Season: | Ene-Mar |
| Volumen: | 9 |
| Number: | 1 |
| Pages: | 15-19 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Nota breve o noticia |
| Approach: | Experimental |
| English abstract | The use of shape memory alloys (SMA) as smart structures and other modern applications require a previous evaluation of its performance under load as well as a training procedure. In general, these requirements lead to the design and assembly of a specific test bench. In this work, an experimental set-up was specially designed to perform the electro-thermomechanical characterization of SMA wires. This apparatus was used to determine the strain-temperature (epsilon - T) and electrical resistance-temperature (R - T) hysteretic characteristics curves of a Ti-Ni shape memory wire (90 mm in length and 150 µm in diameter) under mechanical load. The SMA wire is loaded by means of constant weights and a controlled system for injection of electrical power allows performing the heating-cooling cycles. The obtained hysteretic epsilon - T and R - T characteristics curves for some levels of applied loads are used to determine important shape memory parameters, like martensitic transformation temperatures, temperature hysteresis, temperature slopes and shape memory effect under load. These parameters were in accord with the ones found in literature for the studied SMA wires |
| Disciplines: | Ingeniería, Física y astronomía |
| Keyword: | Ingeniería de materiales, Ingeniería eléctrica, Ingeniería mecánica, Electromagnetismo, Aleaciones de memoria de forma, Propiedades mecánicas, Propiedades eléctricas, Resistencia, Temperatura |
| Keyword: | Engineering, Physics and astronomy, Electrical engineering, Materials engineering, Mechanical engineering, Electromagnetism, Shape memory alloys, Mechanical properties, Electrical properties, Resistance, Temperature |
| Full text: | Texto completo (Ver HTML) |
