PSI - Issue 68

Erik Calvo-García et al. / Procedia Structural Integrity 68 (2025) 809–814 Erik Calvo-García et al. / Structural Integrity Procedia 00 (2025) 000–000

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4. Conclusions The present work has addressed the effect of shot peening treatments on the crack growth rate and fracture toughness of an aluminium alloy 6060 T6. SE(B) specimens have been tested according to the ASTM E1820 standard in three conditions: (i) with no surface treatment, (ii) shot peened with silica microspheres and (iii) shot peened with alumina particles. Both shot peening treatments caused substantial plastic deformation in the material surface, although alumina led to a more intense peening treatment than silica. When analysing the crack growth rates, it has been observed that shot peening treatments reduced the crack propagation per loading cycle compared to the specimen with no surface treatment. However, this effect was barely significant and independent of the shot medium used. Likewise, fracture toughness values of the shot peened specimens showed no significant differences with those of the non-treated alloy. Different testing systems would be required to assess better the effect of shot peening on crack propagation. Acknowledgements This work was partially supported by the by the “European Union—NextGenerationEU”, by the Government of Spain—Spanish Center for Industrial Technological Development—CDTI [project number SOLDALAC IDI 20221122 and IDI-20221123], the Spanish Ministry of Universities CAS21/00454 grant and by Xunta de Galicia (ED431C 2023/25 and ED431C 2019/23). References Calvo-García, E., del Val, J., Riveiro, A., Valverde-Pérez, S., Álvarez, D., Román, M., Magdalena, C., Badaoui, A., Pou-Álvarez, P., Comesaña, R., 2024. The Influence of Shot Peening Media on Surface Properties and Fatigue Behaviour of Aluminium Alloy 6082 T6. Journal of Manufacturing and Materials Processing, 8(192). Chang, Y. L., Hung, F. Y., Lui, T. S., 2018. Enhancement of mechanical properties of hot-forged 6082 suspension parts via rapid IR heat treatment. Metals, 8(7). Ferreira, N., Jesus, J. S., Ferreira, J. A. M., Capela, C., Costa, J. M., Batista, A. C., 2020. Effect of bead characteristics on the fatigue life of shot peened Al 7475-T7351 specimens. International Journal of Fatigue, 134, 105521. Ferreira, N., Antunes, P. V., Ferreira, J. A. M., Costa, J. D. M., Capela, C., 2018. Effects of shot-peening and stress ratio on the fatigue crack propagation of AL 7475-T7351 specimens. Applied Sciences, 8(3). Krishna, L. R., Madhavi, Y., Sahithi, T., Wasekar, N. P., Chavan, N. M., Rao, D. S., 2018. Influence of prior shot peening variables on the fatigue life of micro arc oxidation coated 6061-T6 Al alloy. International Journal of Fatigue, 106, 165–174. Liang, Z., Xue-song, L. I. U., Lin-sen, W., Shuang-hui, W. U., Hong-yuan, F., 2012. A model of continuum damage mechanics for high cycle fatigue of metallic materials. Transactions of Nonferrous Metals Society of China, 22(11), 2777–2782. Polmear, I., St. John, D., Nie, J. F., Qian, M., 2017. Light Alloys: Metallurgy of the Light Metals (5th ed.). Elsevier. Segurado, E., Belzunce, F. J., Fernández-Pariente, I., 2018. Mechanical surface treatments to optimize the fatigue behavior of quenched and tempered high strength steels. International Journal of Advanced Manufacturing Technology, 96(1–4), 1225–1235. Su, K., Zhang, J., Li, H., Wu, M., Zhu, S., Yi, K., Zhang, J., 2020. Analysis on the Fatigue Properties of Shot-Peened Al-Si-Mg Alloy and Its Fatigue Life Prediction. Journal of Materials Engineering and Performance, 29(8), 5114–5125. Troiani, E., Zavatta, N., 2019. The effect of laser peening without coating on the fatigue of a 6082-T6 aluminum alloy with a curved notch. Metals, 9(7). Wang, Y., Li, A., Sun, H., Wang, K., 2023. Effect of machined surface integrity on fatigue resistance of aluminum-silicon alloy ZL109. Materials Today Communications, 37, 107165. Wu, M. Z., Zhang, J. W., Mei, G. M., Zhang, J. X., Li, X., 2019. Effects of Fine Particle Shot Peening Treatment on Fatigue Properties of Al-7Si 0.3Mg Alloy. Journal of Materials Engineering and Performance, 28(5), 2600–2609. Bergant, Z., Trdan, U., Grum, J., 2016. Effects of laser shock processing on high cycle fatigue crack growth rate and fracture toughness of aluminium alloy 6082-T651. International Journal of Fatigue 87, 444–455.