TY - JOUR AU - Rodríguez, D. AU - Mañero, J. M. AU - Gil, F. J. AU - Planell, J. A. PY - 2001/04/30 Y2 - 2024/03/28 TI - Oligocyclic fatigue of the thermochemically nitrided Ti6Al4V alloy JF - Revista de Metalurgia JA - Rev. metal. VL - 37 IS - 2 SE - Articles DO - 10.3989/revmetalm.2001.v37.i2.447 UR - https://revistademetalurgia.revistas.csic.es/index.php/revistademetalurgia/article/view/447 SP - 108-111 AB - The use of titanium and its alloys in applications with the presence of friction is limited, due to low hardness and reduced tribological properties. Some surface treatments are available in order to correct these problems, like the thermal surface treatment by means of nitrogen gaseous diffusion at high temperature. Nitrogen enters into the material by diffusion, creating a surface layer of increased hardness. Oligocyclic fatigue behaviour in air of Ti<sub>6</sub>Al<sub>4</sub>V alloy has been studied. Results show a reduction of oligocyclic fatigue loads up to 10 % compared to the not-treated material. Studies suggest it is not related to the titanium nitride surface layer, but to microstructural changes caused by the high temperature treatment. ER -