Papel clave de las pseudocolonias perlíticas en la fractura anisótropa de muestras entalladas en “V” de aceros perlíticos trefilados
- 1 Grupo de Investigación en Fractura e Integridad Estructural (GIFIE), Universidad de Salamanca (USAL)
ISSN: 2792-4246
Ano de publicación: 2022
Número: 3
Páxinas: 57-62
Tipo: Artigo
Outras publicacións en: Revista española de mecánica de la fractura
Resumo
This paper describes the anisotropic fracture behaviour of V-shaped notched samples of heavily cold drawn pearlitic steels, analyzing the key role of a new (non-conventional) microstructural unit in such steels: the pearlitic pseudocolony, a special colony in which the lamellae are not oriented along the wire axis or cold drawing direction (contrarily to what happens in the normal conventional colonies), thereby producing a clearly anomalous (very high) local interlamellar spacing, making the pseudocolonies weakest units or potential fracture initiation loci and promoting crack deflection associated with anisotropic fracture behaviour and mixed-mode propagation.