PSI - Issue 59

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Procedia Structural Integrity 00 (2024) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Procedia Structural Integrity 00 (2024) 000 – 000

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 59 (2024) 206–213

© 2024 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 DMDP 2023 Organizers © 2024 The Auth ors. 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 DMDP 2023 Organizers Keywords: cold drawn pearlitic steel wires; prestressing steel wires; prestressed concrete steel wire; hydrogen embrittlement; hydrogen damage; hydrogen degradation; hydrogen assisted cracking; residual stresses; stress-assisted hydrogen diffusion; fracture criterion; manufacturing process. Abstract Hydrogen embrittlement (HE) is a general phenomenon that lowers the fracture resistance of high strength prestressing steels, and therefore raises the failure risk of prestressed concrete structures. The Ammonium Thiocyanate Test (ATT) was proposed by the International Federation of Prestressing (FIP) as a suitable method for checking the HE susceptibility of prestressing steels. In this paper, a detailed analysis is made of the influence of the residual stress distribution on HE performance of cold drawn eutectoid pearlitic steel wires, measured by means of the time to failure in the FIP test. To this end, a numerical model was used to predict the wire life in the aggressive solution. The model includes hydrogen transport by stress-assisted diffusion towards both the points of minimum concentration and the places of maximum hydrostatic stress, as well a cracking/damage/fracture criterion to calculate the time to failure for each level of externally-applied stress during the ATT proposed by the FIP. © 2024 The Auth ors. 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 DMDP 2023 Organizers Keywords: cold drawn pearlitic steel wires; prestressing steel wires; prestressed concrete steel wire; hydrogen embrittlement; hydrogen damage; hydrogen degradation; hydrogen assisted cracking; residual stresses; stress-assisted hydrogen diffusion; fracture criterion; manufacturing process. VII International Conference ―In -service Damage of Materials: Diagnostics and Prediction ‖ (DMDP 2023) Influence of residual stresses on the hydrogen embrittlement of high-strength cold-drawn eutectoid pearlitic steel wires Jesús Toribio * Fracture & Structural Integrity Research Group (FSIRG), University of Salamanca (USAL) E.P.S., Campus Viriato, Avda. Requejo 33, 49022 Zamora, Spain Abstract Hydrogen embrittlement (HE) is a general phenomenon that lowers the fracture resistance of high strength prestressing steels, and therefore raises the failure risk of prestressed concrete structures. The Ammonium Thiocyanate Test (ATT) was proposed by the International Federation of Prestressing (FIP) as a suitable method for checking the HE susceptibility of prestressing steels. In this paper, a detailed analysis is made of the influence of the residual stress distribution on HE performance of cold drawn eutectoid pearlitic steel wires, measured by means of the time to failure in the FIP test. To this end, a numerical model was used to predict the wire life in the aggressive solution. The model includes hydrogen transport by stress-assisted diffusion towards both the points of minimum concentration and the places of maximum hydrostatic stress, as well a cracking/damage/fracture criterion to calculate the time to failure for each level of externally-applied stress during the ATT proposed by the FIP. VII International Conference ―In -service Damage of Materials: Diagnostics and Prediction ‖ (DMDP 2023) Influence of residual stresses on the hydrogen embrittlement of high-strength cold-drawn eutectoid pearlitic steel wires Jesús Toribio * Fracture & Structural Integrity Research Group (FSIRG), University of Salamanca (USAL) E.P.S., Campus Viriato, Avda. Requejo 33, 49022 Zamora, Spain

* Corresponding author. Tel.: +34-677566723; fax: +34-980545002. E-mail address: toribio@usal.es * Corresponding author. Tel.: +34-677566723; fax: +34-980545002. E-mail address: toribio@usal.es

2452-3216 © 2024 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 DMDP 2023 Organizers 2452-3216 © 2024 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 DMDP 2023 Organizers

2452-3216 © 2024 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 DMDP 2023 Organizers 10.1016/j.prostr.2024.04.030