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

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ScienceDirect

Procedia Structural Integrity 59 (2024) 31–35

© 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: crack tip strain rate (CTSR); local strain rate at a crack tip; local strain rate in the vicinity of a crack tip; global strain rate; remote strain rate; applied displacement rate; crosshead speed; kinematic variables; environmentally assisted cracking. 1. Introduction Environmentally assisted cracking (EAC) processes depend markedly on kinematic variables such as the strain rate, the dependence being non monotonic for localized anodic dissolution (LAD) or pure stress corrosion cracking (SCC) and monotonic for hydrogen embrittlement (HE) or hydrogen assisted cracking (HAC) phenomena. Abstract This paper studies the crack tip strain rate (CTSR), local strain rate at a crack tip or local strain rate in the vicinity of a crack tip. It is the really governing variable in environmentally assisted cracking (EAC) processes involving cracked samples. Therefore, when cracked specimens are used in EAC testing and analysis, e.g. using the slow strain rate testing (SSRT) technique, it is the local strain rate at the crack tip or its vicinity (crack tip strain rate CTSR) – instead of the global strain rate, remote strain rate, applied displacement rate or crosshead speed – the kinematic variable governing the environmentally assisted process. © 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: crack tip strain rate (CTSR); local strain rate at a crack tip; local strain rate in the vicinity of a crack tip; global strain rate; remote strain rate; applied displacement rate; crosshead speed; kinematic variables; environmentally assisted cracking. 1. Introduction Environmentally assisted cracking (EAC) processes depend markedly on kinematic variables such as the strain rate, the dependence being non monotonic for localized anodic dissolution (LAD) or pure stress corrosion cracking (SCC) and monotonic for hydrogen embrittlement (HE) or hydrogen assisted cracking (HAC) phenomena. VII International Conference “In -service Damage of Materials: Diagnostics and Prediction ” (DMDP 2023) On the Crack Tip Strain Rate Jesús Toribio * Fracture & Structural Integrity Research Group (FSIRG), University of Salamanca (USAL) E.P.S., Campus Viriato, Avda. Requejo 33, 49022 Zamora, Spain Abstract This paper studies the crack tip strain rate (CTSR), local strain rate at a crack tip or local strain rate in the vicinity of a crack tip. It is the really governing variable in environmentally assisted cracking (EAC) processes involving cracked samples. Therefore, when cracked specimens are used in EAC testing and analysis, e.g. using the slow strain rate testing (SSRT) technique, it is the local strain rate at the crack tip or its vicinity (crack tip strain rate CTSR) – instead of the global strain rate, remote strain rate, applied displacement rate or crosshead speed – the kinematic variable governing the environmentally assisted process. VII International Conference “In -service Damage of Materials: Diagnostics and Prediction ” (DMDP 2023) On the Crack Tip Strain Rate 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.2024.04.006