Artículos de revistas
Initiation and growth of short cracks during cycling in an aged superduplex stainless steel
Fecha
2011-08Registro en:
Balbi, Marcela Ángela; Hereñu, Silvina Andrea Noemi; Proriol Serre, I.; Vogt, J. B.; Armas, A. F.; et al.; Initiation and growth of short cracks during cycling in an aged superduplex stainless steel; Trans Tech Publications; Key Engineering Materials; 465; 8-2011; 411-414
1013-9826
Autor
Balbi, Marcela Ángela
Hereñu, Silvina Andrea Noemi
Proriol Serre, I.
Vogt, J. B.
Armas, A. F.
Alvarez Armas, I.
Resumen
The kinetics of short crack growth during cycling has been studied in a superduplex stainless steel in aged condition. After few cycles, slip lines appear distributed in both phases but the preferred phase for microcrack nucleation is the ferrite. Contrary to the exponential behavior observed in the as-received material, the growth rate of microcracks in aged condition follows a rather linear law. Internal dislocation structures were studied in the near surface region; microbands that sometimes extend over several grains were found at approximately 45º of the tensile axis on ferrite grains. The origin of the microbands has been analyzed and correlated with the microcracks.