PSI - Issue 37

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2019) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000 – 000 Available online at www.sciencedirect.com ScienceDirect

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Procedia Structural Integrity 37 (2022) 540–546

© 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 Pedro Miguel Guimaraes Pires Moreira Click here and insert your abstract text. © 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 Pedro Miguel Guimaraes Pires Moreira Keywords: Fatigue, heat dissipation, laser shock peening, crack propagation 1. Introduction The fatigue properties of metals are important parameters for design of complex objects in industry. Recent investigations of fatigue of metals have shown that the residual stress significantly affects fatigue properties of materials. There are many different techniques to initiate the residual stress on the material such as cold expansion [McClung, R.C.], shot peening [Liu, Q., Baburamani, P., and Loader, C.,], deep rolling [McClung, R.C.], low plasticity burnishing [LAMBDA Technology Group], and laser surface heating [Jayaraman, N., Hornbach, D. J., and Prev ey, P. S.] The laser shock peening is the modern technique for residual stress generation. The high-energy laser impact generates the plasma on the surface of material which expands rapidly and initiates a shock wave in the material. The Abstract The work is devoted to experimental inves igation of laser sho k p ening (LSP) effect on the thermo-mechanic l pr perti s of metals. ARMCO-iron and Titanium Grade 2 are chos for the study. S mpl s were subject d to laser sh ck peening. After that, investigation of residual ress on heat generatio during fatigue loading was performed. To study t e damage-induced heating the fatigue t sts were coupled with infrar d hermography measurements. The results of the stu y have s own that LSP procedure qualitatively chang s temper tur vo ution in both m terials u der cyclic loading. The heating (energy dissipation) of specimens after LSP was several times higher than in initial state. Click here and inse t yo r abstract text. © 2022 The Authors. Published by ELSEVIER B.V. This is an ope acces article under th CC BY-NC-ND lic nse (https://cre tivecommons.org/licenses/by-nc-nd/4.0) P er-review und r responsibility of Pedro Miguel Guimaraes Pires Moreira Keywords: Fatigue, heat dissipation, laser shock peening, crack propagation 1. Introduction The fatigue properti s of etals are important parameters for design of complex objects in industry. R cent investigations of fatigue of m tals have shown that th residual stre s ignificantly affect fatigue propertie f materials. There are many different techniq es to initiate the residual stress on the material such as cold expansion [McClung, R.C.], shot peening [Liu, Q., Baburamani, P., and Loader, C.,], deep rolling [McClung, R.C.], low plasticity burnishing [LAMBDA Technology Group], and laser surface heating [Jayaraman, N., Hornbach, D. J., and Prev ey, P. S.] The laser shock peening is the modern technique for residual stress generation. The high-e ergy las r impact generates the plasma on the surface of material which expands rapidly and initiates a shock wave in the material. The ICSI 2021 The 4th International Conference on Structural Integrity Fatigue peculiarity of metals treated by laser shock impact Prokhorov A. a *, Vshivkov A. a , Plekhov О . a Kashaev N. b a Institute of Continuous Media Mechanics UB RAS, 1, Korolev St., Perm 614013, Russia b Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502 Geesthacht, Germany Abstract The work is devoted to experimental investigation of laser shock peening (LSP) effect on the thermo-mechanical properties of metals. ARMCO-iron and Titanium Grade 2 are chosen for the study. Samples were subjected to laser shock peening. After that, investigation of residual stress on heat generation during fatigue loading was performed. To study the damage-induced heating the fatigue tests were coupled with infrared thermography measurements. The results of the study have shown that LSP procedure qualitatively changes temperature evolution in both materials under cyclic loading. The heating (energy dissipation) of specimens after LSP was several times higher than in initial state. ICSI 2021 The 4th International Conference on Structural Integrity Fatigue peculiarity of metals treated by laser shock impact Prokhorov A. a *, Vshivkov A. a , Plekhov О . a Kashaev N. b a Institute of Continuous Media M chanics UB RAS, 1, Koro ev St., Perm 6 4 13, Russia b Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Str. 1, 21502 Geesthacht, Germany

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 Pedro Miguel Guimaraes Pires Moreira 2452-3216 © 2022 The Authors. Published by ELSEVIER B.V. This is an ope acces article under th CC BY-NC-ND lic nse (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Pedro Miguel Guimaraes Pires Moreira

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 Pedro Miguel Guimaraes Pires Moreira 10.1016/j.prostr.2022.01.120