PSI - Issue 41

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Procedia Structural Integrity 00 (2022) 000–000 Available online at www.sciencedirect.com ScienceDirect Procedia Structural Integrity 00 (2022) 000–000

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Procedia Structural Integrity 41 (2022) 724–727

© 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 MedFract2Guest Editors. © 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 MedFract2 Guest Editors Keywords: high-strength pearlitic steel; hydrogen embrittlement (HE); hydrogen assisted cracking (HAC); hydrogen assisted fracture (HAF); hydrogen assisted microdamage (HAMD); tearing topography surface (TTS); critical stress intesity factor ( K H ); crack growth kinetics (CGK) curve, Michelangelo Stone Sculpture Texture (MSST). Abstract A fracture mechanics appro ch to hydrogen-assisted microdamage and failure analysis of high-strength pearlitic steel wires is presented. Fractographic analysis reve led micromechanic l effects of hydrogen in the form of tearing topography surf ce (TTS). The progress of this microdamage is modelled as a macroscopic crack that extends the ori inal fatigue precrack nd involves li ear elastic fracture mechanics (LEFM) principles. In this case, the hange from hydrogen-assisted microdam g (HAMD) in the form of TTS (subcritical mode) to cleavage-like topography (critical regime associated with failure) takes plac when a critical stress intensity factor ( K H ) is re hed, and this value depends on the amount of hydrogen which penetrated the vicinity of the actual crack tip (the fatigue precrack plus the TTS extension). It is seen that the crack growth by TTS corresponds to the horizontal part ( plateau ) in the crack growth kinetics (CGK) curve da/dt-K until reaching the critical level K H . © 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 MedFract2 Guest Editors Keywords: high-strength pearlitic steel; hydrogen embrittlement (HE); hydrogen assisted cracking (HAC); hydrogen assisted fracture (HAF); hydrogen assisted micr damage (HAMD); tearing topography surface (TTS); critical stress intesity factor ( K H ); crack growth kinetics (CGK) curve, Michelangelo Stone Sculpture Texture (MSST). 2nd Mediterranean Conference on Fracture and Structural Integrity A fracture mechanics approach to hydrogen assisted microdamage and failure analysis of high-strength pearlitic steel wires: Resembling Michelangelo Stone Sculpture Texture Jesús Toribio * Fracture & Structural Integrity Research Group (FSIRG), University of Salamanca (USAL) E.P.S., Campus Viriato, Avda. Requejo 33, 49022 Zamora, Spain Abstract A fracture mechanics approach to hydrogen-assisted microdamage and failure analysis of high-strength pearlitic steel wires is presented. Fractographic analysis revealed micromechanical effects of hydrogen in the form of tearing topography surface (TTS). The progress of this microdamage is modelled as a macroscopic crack that extends the original fatigue precrack and involves linear elastic fracture mechanics (LEFM) principles. In this case, the change from hydrogen-assisted microdamage (HAMD) in the form of TTS (subcritical mode) to cleavage-like topography (critical regime associated with failure) takes place when a critical stress intensity factor ( K H ) is reached, and this value depends on the amount of hydrogen which penetrated the vicinity of the actual crack tip (the fatigue precrack plus the TTS extension). It is seen that the crack growth by TTS corresponds to the horizontal part ( plateau ) in the crack growth kinetics (CGK) curve da/dt-K until reaching the critical level K H . 2nd Mediterranean Conference on Fracture and Structural Integrity A fracture mechanics approach to hydrogen assisted microdamage and failure analysis of high-strength pearlitic steel wires: Resembling Michelangelo Stone Sculpture Texture Jesús Toribio * Fracture & Structural Integrity Research Group (FSIRG), University of al manca (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 * Correspon ing author. Tel.: +34-677566723; fax: +34-980545002. E-mail address: toribio@usal.es

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 conference Guest Editors 2452-3216 © 2022 The Authors. Published by ELSEVIER B.V. This is an ope acces article under CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0)

Peer-review under responsibility of the conference Guest Editors

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 MedFract2Guest Editors. 10.1016/j.prostr.2022.05.083