Artículo
Short fatigue crack propagation during low-cycle, high cycle andvery-high-cycle fatigue of duplex steel – An unified approach
Fecha de publicación:
07/2014
Editorial:
Elsevier
Revista:
International Journal of Fatigue
ISSN:
0142-1123
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The present paper reviews experimental results on the fatigue damage of austenitic–ferritic duplex steel under various load levels ranging from LCF to VHCF, placing the focus towards the relationship between the crystallographic orientation of individual grains and grain patches that exhibit slip band formation, fatigue crack initiation and growth. A combination between fatigue testing of electropolished specimens and analytical electron microscopy (SEM/EBSD, TEM) revealed that under LCF loading conditions almost all the ferrite and the austenite grains showed plasticity, while under HCF and VHCF loading conditions, slip band formation was limited to the softer austenite grains and a low plastic activity is observed in the ferrite. Once being formed, the bands generate high stress concentrations, where they impinge the α–γ phase boundaries, eventually, leading to the crack initiation. This is discussed by applying a numerical simulation approach based on the finite-element (FEM) and the boundary-element (BEM) method.
Palabras clave:
Duplex Stainless Steels
,
Short Fatigue Crack
,
Vhcf
,
Hcf
,
Lcf
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(IFIR)
Articulos de INST.DE FISICA DE ROSARIO (I)
Articulos de INST.DE FISICA DE ROSARIO (I)
Citación
Krupp, Ulrich; Alvarez, Iris; Short fatigue crack propagation during low-cycle, high cycle andvery-high-cycle fatigue of duplex steel – An unified approach; Elsevier; International Journal of Fatigue; 65; 7-2014; 78-85
Compartir
Altmétricas