Fatigue crack initiation and growth in a 35CrMo4 steel investigated by infrared thermography
Idioma
en
Article de revue
Este ítem está publicado en
Fatigue & Fracture of Engineering Materials & Structures. 2005, vol. 28, n° 1-2, p. 169–178
Wiley-Blackwell
Resumen en inglés
The present work is devoted to the investigation of fatigue crack initiation and growth in middle-cycle fatigue (∼105 cycles). Smooth specimens made of 35CrMo4 quenched and tempered steel were loaded in fully reversed plane ...Leer más >
The present work is devoted to the investigation of fatigue crack initiation and growth in middle-cycle fatigue (∼105 cycles). Smooth specimens made of 35CrMo4 quenched and tempered steel were loaded in fully reversed plane bending. Temperature field evolution in time was recorded with an infrared camera. The experimental results show that the local heating of metal under fatigue loading is a sensitive and accurate enough manifestation of small fatigue crack initiation. It is shown that the time evolution of the spatial standard deviation of the temperature field can be used to investigate the damage localization and to monitor both the crack initiation and the current location of the fatigue crack tip. This should help to investigate the behaviour of defect during cyclic loading.< Leer menos
Palabras clave en inglés
infrared thermography
middle-cycle fatigue
crack growth
crack initiation
Orígen
Importado de HalCentros de investigación