High Strength Steels Fracture Toughness Variation by the Media

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

Description

Title: High Strength Steels Fracture Toughness Variation by the Media
Author/s:
  • Sanchez, Javier
  • Fullea García, José
  • Andrade Perdrix, María del Carmen
Item Type: Presentation at Congress or Conference (Article)
Event Title: Joint fib-RILEM Workshop, 2010
Event Dates: 22/11/2010 - 23/11/2010
Event Location: Madrid, España
Title of Book: Modelling of Corroding Concrete Structures. Proceedings of the Joint fib-RILEM Workshop
Date: 2010
ISBN: 978-94-007-0676-7
Volume: 5
Subjects:
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Otro
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

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.

More information

Item ID: 9335
DC Identifier: http://oa.upm.es/9335/
OAI Identifier: oai:oa.upm.es:9335
Deposited by: Memoria Investigacion
Deposited on: 24 Oct 2011 09:27
Last Modified: 14 May 2020 08:33
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