INVESTIGADORES
ALVAREZ Iris
artículos
Título:
Short Crack Initiation during Low-Cycle Fatigue in SAF 2507 Duplex Stainless Steel
Autor/es:
MC MARINELLI; S DEGALLAIX; I ALVAREZ
Revista:
KEY ENGINEERING MATERIALS
Editorial:
Trans Tech Publications
Referencias:
Lugar: Durnten-Zurich; Año: 2007 vol. 345- p. 343 - 345
ISSN:
1013-9826
Resumen:
In this work, the formation of fatigue cracks is considered as a nucleation process due to the development of a characteristic microstructure formed just beneath the specimen surface. Strain controlled cyclic tests were carried out at room temperature at total strain ranges εt = 0.8 and 1.2% in flat specimens of SAF 2507 Duplex Stainless Steel (DSS). The results show that for this DSS, at εt= 0.8%, the correlation between phases (Kurdjumov-Sacks crystallographic relation) plays an important role in the formation of microcracks. On the other hand, at εt= 1.2%, microcracks initiate in the ferritic phase and the K-S relation does not seem to affect the formation of the cracks.
