High Strength Steels Fracture Toughness Variation by the Media

Sanchez, Javier; Fullea García, José y Andrade Perdrix, Maria del Carmen (2010). High Strength Steels Fracture Toughness Variation by the Media. En: "Joint fib-RILEM Workshop, 2010", 22/11/2010 - 23/11/2010, Madrid, España. ISBN 978-94-007-0676-7.

Descripción

Título: High Strength Steels Fracture Toughness Variation by the Media
Autor/es:
  • Sanchez, Javier
  • Fullea García, José
  • Andrade Perdrix, Maria del Carmen
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: Joint fib-RILEM Workshop, 2010
Fechas del Evento: 22/11/2010 - 23/11/2010
Lugar del Evento: Madrid, España
Título del Libro: Modelling of Corroding Concrete Structures. Proceedings of the Joint fib-RILEM Workshop
Fecha: 2010
ISBN: 978-94-007-0676-7
Volumen: 5
Materias:
Escuela: E.T.S.I. Caminos, Canales y Puertos (UPM)
Departamento: Otro
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

The stress corrosion cracking process is at this moment an unknown mechanism of deterioration. It is a process that implies the joint action of the media, the presence of corrosion or a surface defect and of stress in the metal. Prestressing tendons can suffer SCC jointly with hydrogen embrittlement which dramatically changes not only the type of fracture (from ductile to brittle) but also the kinetics of the process leading to unexpected collapses. The metal should be resistant to this type of process which can be characterized by its toughness and therefore by its damage tolerance. This research shows that the Fracture Toughness change when the steel corrodes, questioning the idea that is an intrinsic characteristic of the material. The reduction in the fracture toughness of steel wires when they are in contact to aggressive media involve that the material fractures with a lower crack depth for the same stress level. That means that the material becomes less damage tolerant, which implies that it is necessary to detect defects of smaller size, as for example, small notch, pits or superficial cracks. In the paper some results of the percentage of decrease of the toughness of prestressing wires suffering corrosion are presented.

Más información

ID de Registro: 9335
Identificador DC: http://oa.upm.es/9335/
Identificador OAI: oai:oa.upm.es:9335
Depositado por: Memoria Investigacion
Depositado el: 24 Oct 2011 09:27
Ultima Modificación: 20 Abr 2016 17:47
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