INTEMA   05428
INSTITUTO DE INVESTIGACIONES EN CIENCIA Y TECNOLOGIA DE MATERIALES
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Fatigue crack growth in a metastable austenitic stainless steel
Autor/es:
D.F. MARTELO; CHAPETTI, M D
Lugar:
Pekin
Reunión:
Conferencia; 13th International Conference of Fracture, 2013; 2013
Institución organizadora:
The Chinese Society of Theoretical and Applied Mechanics (CSTAM) y otros
Resumen:
Fatigue crack growth in a metastable austenitic stainless steel was investigated in thin specimen under positive stress ratio. Annealed conditions were used to test the influence of the microstructure. The influence of load ratio on propagation threshold and propagation behavior was analyzed using the Elber`s closure approach, the Donal and Paris partial crack closure and the empirical Kujawski (DKxKmx) parameter. Results show that load ratio effects are not completely explained by these approaches. It was found that the threshold of the material in the annealed condition depends on the load history, especially when the load ratio is low. It seems that the amount of martensite transformation is responsible for the observed differences in fatigue crack growth resistance.