| Revista: | Materials research |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000312875 |
| ISSN: | 1516-1439 |
| Autores: | Lima, Milton Sergio Fernandes de1 |
| Instituciones: | 1Swiss Federal Institute of Technology, Lausana, Vaud. Suiza |
| Año: | 2005 |
| Periodo: | Jul-Sep |
| Volumen: | 8 |
| Número: | 3 |
| Paginación: | 323-328 |
| País: | Brasil |
| Idioma: | Inglés |
| Tipo de documento: | Nota breve o noticia |
| Enfoque: | Experimental |
| Resumen en inglés | A new welding method which allows the assembly of two titanium nitride coated titanium parts is proposed. The welding procedure utilizes the possibility for pulse-shaping in order to change the energy distribution profile during the laser pulse. The pulse-shaping is composed of three elements: a) a short high power pulse for partial ablation at the surface; b) a long pulse for thermal penetration; and c) a quenching slope for enhanced weldability. The combination of these three elements produces crack-free welds. The weld microstructure is changed in comparison to normal welding, i.e. with a rectangular pulse, as the nitrogen and the microhardness are more homogenously distributed in the weld under pulse-shaping conditions. This laser pulse dissolves the TiN layer and allows nitrogen to diffuse into the melt pool, also contributing to an enhanced weldability by providing suitable thermal conditions |
| Disciplinas: | Ingeniería |
| Palabras clave: | Ingeniería de materiales, Ingeniería metalúrgica, Soldadura, Láser, Nitruro de titanio, Revestimientos, Calidad, Propiedades mecánicas |
| Keyword: | Engineering, Materials engineering, Metallurgical engineering, Welding, Laser, Titanium nitride, Coatings, Quality, Mechanical properties |
| Texto completo: | Texto completo (Ver HTML) |
