PSI - Issue 72

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ScienceDirect

Procedia Structural Integrity 72 (2025) 260–264

12th Annual Conference of Society for Structural Integrity and Life (DIVK12) STUDIES ON LASER SHOCK PEENING WITH DIFFERENT ABSORBING COATINGS E.A. Gachegova a, *, O.A. Plekhov a , A.N. Vshivkov a a Institute of Continuous Media Mechanics, 614013, Academician Korolev Str. 1, Perm, Russia, Abstract At present, laser shock peening (LSP) is a promising methods of surface hardening of metals. It allows to increase the life of machined parts, improve their fatigue properties and corrosion resistance. Many different LSP parameters must be selected to achieve the desired hardening result. One of such parameters is the material of the absorbing layer. The purpose of this work is to study the influence of this layer material on the surface condition of the samples, microhardness and distribution of residual stresses (RS), which were created in the nearsurface layer during treatment. As a result of this research, the optimal materials for absorbent coatings in laboratory and industrial settings were determined. The significant effect of these coatings on surface roughness and residual stress has been demonstrated. There has also been a slight increase in microhardness in this area. © 2026 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 Aleksandar Sedmak, Branislav Djordjevic, Simon Sedmak Dr. Simon Sedmak, ssedmak@mas.bg.ac.rs, Innovation Center of Faculty of Mechanical Engineering, Belgrade, Serbia

Keywords: laser shock peening; residual stress; microhardness; absorbing coating

1. Introduction Currently, laser shock peening (LSP) is a promising methods for increasing the fatigue life of metal structural elements, Ding and Ye (2006). The essence of this method is that, under the action of laser pulses, a plasma is generated on the surface of the part. This plasma creates shock waves which propagate into the depths of the material, creating residual compressive stresses that prevent the nucleation and propagation of fatigue cracks.

* Corresponding author. Tel.: +380352519700. E-mail address: gachegova.e@icmm.ru

2452-3216 © 2026 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 Aleksandar Sedmak, Branislav Djordjevic, Simon Sedmak Dr. Simon Sedmak, ssedmak@mas.bg.ac.rs, Innovation Center of Faculty of Mechanical Engineering, Belgrade, Serbia 10.1016/j.prostr.2025.08.101