INVESTIGADORES
AVALOS Martina Cecilia
artículos
Título:
Microcrack growth and fatigue behavior of a duplex stainless steel
Autor/es:
M. BALBI; M. AVALOS; A. EL BARTALI; I. ALVAREZ ARMAS
Revista:
INTERNATIONAL JOURNAL OF FATIGUE
Editorial:
Elsevier
Referencias:
Lugar: Amsterdam; Año: 2009 vol. 31 p. 2006 - 2013
ISSN:
0142-1123
Resumen:
The kinetics of microcrack growth during cycling has been studied in a S32205 duplex stainless steel in
the as-received and aged (100 h at 475 C) conditions. Cylindrical specimens with a shallow notch were
subjected to a constant plastic strain range of 0.3% in both thermal conditions. The characteristic features
of surface damage and crack growth showed striking differences in microcrack density, nucleation location
and propagation rate between the two thermal conditions even though the fatigue lives are comparable.
In the as-received material, microcrack density is low and they nucleate mainly at grain and phase
boundaries or second-phase particles. In the aged condition, slip markings first appear in the ferritic
phase and they are the preferred site for microcrack nucleation. Crack propagation takes place along slip
markings in adjacent grains for crack lengths less than 100 lm. A comparison between fatigue life and
the relevant parameters of a microcrack growth law was made.
the relevant parameters of a microcrack growth law was made.
the relevant parameters of a microcrack growth law was made.
the relevant parameters of a microcrack growth law was made.
lm. A comparison between fatigue life and
the relevant parameters of a microcrack growth law was made.