PSI - Issue 66

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2025) 000 – 000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 66 (2024) 362–369

8th International Conference on Crack Paths Crack growth behavior of Inconel 718 under fretting fatigue at room and high temperature María Moreno-Rubio a *, Jesús Vázquez, Carlos Navarro, Jaime Domínguez a Departamento de Ingeniería Mecánica y Fabricación, Universidad de Sevilla, Camino de los descubrimientos s/n, Sevilla, 41092, España Abstract Fretting fatigue remains a problem not widely known to society, although it has a significant presence in the engineering world, especially in the blade-disc connections of gas turbines and compressor. This problem is a phenomenon that appears in mechanical assemblies subjected to fluctuating contact forces. In this study, the fretting fatigue behavior with Inconel 718 at room and high temperature was analyzed using ‘do g- bone’ fretting fatigue specimens with a cylindrical contact pad. Inconel 718 is a nickel-chromium based superalloy that possesses excellent mechanical properties against oxidation and corrosion, even at high temperature. The aim of this work is to analyze the fretting fatigue damage, in order to determinate the fatigue crack growth rate, and examine crack evolution to compare it with an analytical model. To achieve this, the crack surfaces are inspected with a scanning electron microscope. The fatigue model used combines the initiation and propagation phase without defining a priori when one ends and the other begins, and considers that cracks initiate and propagate completely normal to the surface of the specimen. © 2025 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) © 2025 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 CP 2024 Organizers

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* Corresponding author. Tel.: +34954487387. E-mail address: mmorenor@us.es

2452-3216 © 2025 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 CP 2024 Organizers

2452-3216 © 2025 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 CP 2024 Organizers 10.1016/j.prostr.2024.11.087