PSI - Issue 42

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ Structural Integrity Procedia 00 (2019) 000 – 000

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ScienceDirect

Procedia Structural Integrity 42 (2022) 602–607

© 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the 23 European Conference on Fracture – ECF23 correlated to the fracture behavior of the bars. © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of 23 European Conference on Fracture - ECF23 Keywords: High-strength martensitic steel; stress corrosion cracking; failure mechanisms; 1. Introduction High-strength steel bars provide versatility, sustainability and resilience for the construction and repair of bridges and other prestressed concrete structures. According to prEN10138-4 (2005) and E722 (2003) standards, these are manufactured with diameters in the range of 15 and 60 mm and smooth or corrugated surfaces and a minimum tensile strength of 1 GPa. This high-tensile strength is acquired in the manufacturing process by heat treatment that is is an open access article under the CC BY-NC-ND license (http n 23 European Conference on Fracture - ECF23 Stress corrosion assisted collapse in flat tensile specimens of high strength structural steel Mihaela Iordachescu a *, Patricia Santos a , Andrés Valiente a , Maricely de Abreu a a Material Science Dpt., ETSI Caminos, Universidad Politécnica de Madrid, 5 Prof. Aranguren St., 28040-Madrid, Spain Abstract High-strength steel bars used in construction provide versatile solutions for meeting the modern criteria of sustainability and resilience required in structural engineering, through a sensitivity to assisted cracking places structural integrity at risk and limits the potential applications. One of the bar types commercially available, though less used due to this risk, are made of martensitic steel but recent improvements incorporated to their fabrication led to a randomly oriented lath-martensite microstructure that reduces their brittleness. The objective of the present research was to determine the effect of this martensitic microstructure on bar behavior regarding stress corrosion cracking. In this view, various slow-rate tensile tests have been carried out in an environment that favors hydrogen-assisted cracking and allows subcritical cracking micro-mechanisms to be identified and Mihaela Iordachescu a *, Patricia Santos a , Andrés Valiente a , Maricely de Abreu a

* Corresponding author. Tel.: +0-000-000-0000 ; fax: +0-000-000-0000 . E-mail address: mihaela.iordachescu@upm.es

2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of 23 European Conference on Fracture - ECF23

2452-3216 © 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the 23 European Conference on Fracture – ECF23 10.1016/j.prostr.2022.12.076