Fisuración asistida por hidrógeno en microestructuras perlíticas orientadasrecordando la textura de la escultura en madera de donatello (TEMD) & la perspectiva del “cristo muerto” de mantegna (PCMM)
- 1 Grupo de Investigación en Fractura e Integridad Estructural (GIFIE), Universidad de Salamanca (USAL) Campus Viriato, España
ISSN: 2792-4246
Year of publication: 2023
Issue: 6
Pages: 49-54
Type: Article
More publications in: Revista española de mecánica de la fractura
Abstract
Progressive cold drawing in eutectoid steel produces a preferential orientation of pearlitic colonies and ferrite/cementite lamellae, thus inducing strength anisotropy in the steel and mixed mode propagation. While in the hot rolled steel (not cold drawn) the pearlitic microstructure is randomly oriented and the crack advances in hydrogen by breaking the ferrite/cementite lamellae, in the most heavily drawn steels the pearlitic microstructure is fully oriented and the predominant mechanism of hydrogen assisted cracking is the delamination (or decohesion) at the ferrite/cementite interface.