Artículo
Fatigue damage in coarse-grained lean duplex stainless steels
Fecha de publicación:
04/2016
Editorial:
Elsevier Science Sa
Revista:
Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing
ISSN:
0921-5093
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The present investigation is focused on assessing the effect of a thermal treatment for grain coarsening on the low cycle fatigue damage evolution in two types of Lean Duplex Stainless Steels (LDSSs). The dislocation structure developed during cycling is observed by transmission electron microscopy (TEM). Additionally, a detailed analysis of short crack initiated and grown during low cycle fatigue (LCF) is performed by means of optical and scanning electron (SEM) microscopy in combination with automated electron back-scattered diffraction (EBSD) technique. Though in both coarse-grained LDSSs the short cracks nucleate in the ferrite phase, in each steels its origin is different. The embrittlement caused by the Cr2N precipitation and the plastic activity sustained by each phase can explain this difference. The propagation behavior of the short cracks present two alternative growing mechanisms: the crack grows along a favorable slip plane with high Schmid Factor (SF) or the crack alternates between two slip systems. In both cases, the crack follows the path with the smallest tilt angle (β) at a grain boundary.
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Articulos(IFIR)
Articulos de INST.DE FISICA DE ROSARIO (I)
Articulos de INST.DE FISICA DE ROSARIO (I)
Citación
Strubbia, Renata; Hereñu, Silvina Andrea Noemi; Marinelli, María Cecilia; Alvarez, Iris; Fatigue damage in coarse-grained lean duplex stainless steels; Elsevier Science Sa; Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing; 659; 4-2016; 47-54
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