PSI - Issue 52

ScienceDirect Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2023) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2023) 000 – 000 Available online at www.sciencedirect.com

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Procedia Structural Integrity 52 (2024) 214–223

© 2023 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 Professor Ferri Aliabadi Abstract This study presents interpretation and evaluation of a range of isothermal and non-isothermal experimental crack growth data generated by four type tests carrying out by stress-controlled pure fatigue, creep-fatigue interaction, in-phase (IP) and out-of phase (OOP) thermo-mechanical fatigue (TMF) conditions. A crack growth testing method has been developed utilizing inductive and convective heating and direct the crack tip opening displacement techniques for polycrystalline XH73M nickel based alloy. The tests have been carried out using cycles with a trapezoidal and triangular waveform and a temperature range of 400 – 650°C. The crack growth experimental results interpretation is based on finite element analyses of the mechanical stress strain rate fields at the crack tip. In order to determine the modified stress intensity factors under thermo-mechanical loading conditions multi-physics computations were carried out based on the coupled heat loss from magnetic field eddy currents and the forced convective air-cooling which provides the gradients of mechanical elastic – plastic deformations. As a result of the polycrystalline XH73M nickel-based alloy tests performed, it was found that from the crack growth acceleration point of view, the following order of arrangement of fatigue fracture diagrams is formed: isothermal creep-fatigue interaction, isothermal pure fatigue, non-isothermal in-phase thermo-mechanical fatigue and non-isothermal out-of-phase thermo-mechanical fatigue. It has been established that the greatest differences in the crack growth rate in the XH73M nickel alloy due to the type of mechanical loading (pure fatigue, fatigue-creep interaction, thermo-mechanical fatigue) occur at test temperatures above 400°C. Abstract This study presents interpretation and evaluation of a range of isothermal and non-isothermal experimental crack growth data generated by four type tests carrying out by stress-controlled pure fatigue, creep-fatigue interaction, in-phase (IP) and out-of phase (OOP) thermo-mechanical fatigue (TMF) conditions. A crack growth testing method has been developed utilizing inductive and convective heating and direct the crack tip opening displacement techniques for polycrystalline XH73M nickel based alloy. The tests have been carried out using cycles with a trapezoidal and triangular waveform and a temperature range of 400 – 650°C. The crack growth experimental results interpretation is based on finite element analyses of the mechanical stress strain rate fields at the crack tip. In order to determine the modified stress intensity factors under thermo-mechanical loading conditions multi-physics computations were carried out based on the coupled heat loss from magnetic field eddy currents and the forced convective air-cooling which provides the gradients of mechanical elastic – plastic deformations. As a result of the polycrystalline XH73M nickel-based alloy tests performed, it was found that from the crack growth acceleration point of view, the following order of arrangement of fatigue fracture diagrams is formed: isothermal creep-fatigue interaction, isothermal pure fatigue, non-isothermal in-phase thermo-mechanical fatigue and non-isothermal out-of-phase thermo-mechanical fatigue. It has been established that the greatest differences in the crack growth rate in the XH73M nickel alloy due to the type of mechanical loading (pure fatigue, fatigue-creep interaction, thermo-mechanical fatigue) occur at test temperatures above 400°C. Keywords: Crack growth rate; thermo-mechanical fatigue, nickel based super alloy. Fracture, Damage and Structural Health Monitoring Crack Growth Analysis of XH73M Nickel Alloy Under Fatigue, Creep-Fatigue Interaction and Thermo-Mechanical Conditions Fracture, Damage and Structural Health Monitoring Crack Growth Analysis of XH73M Nickel Alloy Under Fatigue, Creep-Fatigue Interaction and Thermo-Mechanical Conditions Valery Shlyannikov a, *, Aleksandr Sulamanidze a , Dmitry Kosov a a FRC Kazan Scientific Center of Russian Academy of Sciences,Lobachevsky Street, 2/31, Kazan,420111, Russia Valery Shlyannikov a, *, Aleksandr Sulamanidze a , Dmitry Kosov a a FRC Kazan Scientific Center of Russian Academy of Sciences,Lobachevsky Street, 2/31, Kazan,420111, Russia

Keywords: Crack growth rate; thermo-mechanical fatigue, nickel based super alloy.

* Corresponding author. Tel.: +7-960-048-1305; fax: +7-843-236-3102. E-mail address: shlyannikov@mail.ru * Corresponding author. Tel.: +7-960-048-1305; fax: +7-843-236-3102. E-mail address: shlyannikov@mail.ru

2452-3216 © 2023 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 Professor Ferri Aliabadi 10.1016/j.prostr.2023.12.022 2452-3216 © 2023 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 Professor Ferri Aliabadi 2452-3216 © 2023 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 Professor Ferri Aliabadi