PSI - Issue 47

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

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 47 (2023) 705–710

© 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 the IGF27 chairpersons Abstract The experimental and theoretical studies were conducted to investigate the regularities of the fracture process in aircraft engine materials, titanium alloy Ti-6Al-4V at different structural levels. The experiment were performed in the laboratory conditions, corresponding to the situation commonly observed in many practical applications, namely, a catastrophic decrease in the lifetime of fan blades of aircraft engines as a result of dwell fatigue failure. The validity of theoretical assumptions about the leading role of multiscale mechanisms of structural relaxation caused by the collective behavior of the ensembles of defects was investigated by the methods of structural analysis of then surface relief morphology using an optical interferometer-profiler. © 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 the IGF27 chairpersons Keywords: Fracture, dwell fatigue, scaling, surface morphology, crack growth kinetics; 27th International Conference on Fracture and Structural Integrity (IGF27) Scale-invariant pattern of fracture surface morphology in titanium alloy Ti-6Al-4V under dwell fatigue loads Aleksandr Inozemtsev a , Oborin Vladimir b, *, Michail Bannikon b , Ivan Gabov a , Oleg Naimark b a Joint-Stock Company «UEC-Aviadvigatel» , 93, Komsomolsky prospect, Perm 614990, Russia a b Institute of Continuous Media Mechanics of Ural branch of RAS, 1, Ac. Koroleva str., Perm 614013, Russia b

* Corresponding author. Tel.: +7-342-2378-312. E-mail address: oborin@icmm.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 the IGF27 chairpersons

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 the IGF27 chairpersons 10.1016/j.prostr.2023.07.049