PSI - Issue 41

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

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 41 (2022) 610–617

© 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. Abstract Measurements of the plastic wave attenuation in the material is very important for understanding Laser Shock Peening (LSP) surface treatment (Seddik et al. (2022)) mechanisms. We have tested thin disk-shaped specimens from titanium VT6 and vanadium VnP-1. Specimens were loaded by Beamtech SGR-Extra-10 Nd:YAG pulse laser. To increase the wave amplitude the front surface was covered by a thin water layer. The water layer should be thin because of the absorption of the IR radiation in the water. At provided laser energy density we did not observe any spallation. We did not observe grain fragmentation and other signs of severe plastic deformation. © 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. Keywords: Laser Shock Peening; VISAR; titanium VT6; vanadium VnP-1; microhardness; microstructure. 1. Introduction Laser Shock Peening (LSP) surface treatment [1] is a promising tool for fatigue life improvement. This is due to the creation of the controlled residual compression stress at the surface layer and due to structure modification (grain refinement etc.). Aim of this study is to determine the residual stress formation using microhardness measurements and to determine changes of the surface layer structure due to laser irradiation 2nd Mediterranean Conference on Fracture and Structural Integrity Laser shock wave loading of the vanadium and titanium S.V. Uvarov a *, A.N. Balakhnin a , I.A. Bannikova a , A.N. Vshivkov a , A.E. Prohorov a , M.Yu. Simonov b , O.B. Naimark a a IMCC UB RAS, Perm 614013, Russia b PNRPU, Perm 614990, Russia Abstract Measurements of the plastic wave attenuation in the material is very important for understanding Laser Shock Pe ning (LSP) surface treatment (Seddik et al. (2022)) mechanisms. We have tested thin disk-shaped specimens from titanium VT6 nd vanadium VnP-1. Specimens wer lo ded by B amt ch SGR-Extra-10 Nd:YAG puls laser. T increase the wave amplitude the front surface wa cov red by a thin water layer. The w ter layer should b thin becaus of the absorption of th IR radiation in the water. At provided laser energy density we did not bserv any spallation. W did no bserve grain fragmentation and other signs of sev e plastic eformation. © 2022 The Authors. Pub ished 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 u der re ponsibility of MedFract2Guest Editors. K ywords: Laser Shock Peening; VISAR; titanium VT6; vanadium VnP-1; microhardness; microstructure. 1. Introduction Laser Shock Peening (LSP) surface treatment [1] is a promising tool for fatigue life improvement. This is due to the creation f the controlled re idu l compression stress at the urface layer nd due to structur modification (grain refinement etc.). Aim of this stu y is t det rmine th residual st ess formation using microhardness me surements and to d termine changes of the surface layer structur due to lase irradiation 2nd Mediterranean Conference on Fracture and Structural Integrity Laser shock wave loading of the vanadium and titanium S.V. Uvarov a *, A.N. Balakhnin a , I.A. Bannikova a , A.N. Vshivkov a , A.E. Prohorov a , M.Yu. Simonov b , O.B. Naimark a a IMCC UB RAS, Perm 614013, Russia b PNRPU, Perm 614990, Russia

* Corresponding author. Tel.: +73422778312. E-mail address: usv@icmm.ru * Corresponding author. Tel.: +73422778312. E-mail ad ress: sv@icmm.ru

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. 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 u der re ponsibility of MedFract2Guest 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.2022.05.069