PSI - Issue 42

V.K. Yadav et al. / Procedia Structural Integrity 42 (2022) 594–601 V.K. Yadav et al., 2022/ Structural Integrity Procedia 00 (2019) 000 – 000

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4. Conclusions The engineering components in aerospace, marine, civil, and transportation industries are often being joined and subjected to cyclic loading in combination with the corrosive environments. Therefore, experimental investigation of the fatigue behavior of welded specimens at different load ratios after pre-corrosion are presented. Due to the refined and stable grains in the nugget zone after FSW, results in the better corrosion resistance than the base metal. With the increase in the immersion time, the corrosion resistance decreases up to 100 hours of immersion and further increase in immersion time has no significant change in the corrosion resistance, thus indicating the saturation state. Pre corrosion has only affected the fatigue crack threshold at each load ratio without affecting the crack growth rate in the Paris regimes. Acknowledgements Author’s would like to thanks Ministry of Human Resource and Development, Govt. of India and Dean of Resources & Alumni Affairs (DORA) of Indian Institute of Technology Roorkee for providing partial funding and relevant infrastructural facility to conduct the experiments. References Thomas, W.M., 1991. Friction stir butt welding. Int. Patent No. PCT/GB92/02203. Aydin, H., Bayram, A., Durgun, I., 2010. The effect of post-weld heat treatment on the mechanical properties of 2024-T4 friction stir-welded joints. Materials & Design 31, 2568 – 2577. Hu, Z., Yuan, S., Wang, X., Liu, G. and Huang, Y., 2011. Effect of post-weld heat treatment on the microstructure and plastic deformation behavior of friction stir welded 2024. Materials & Design 32, 5055-5060. Yadav, V.K., Gaur, V., Singh, I.V., 2020. Effect of post-weld heat treatment on mechanical properties and fatigue crack growth rate in welded AA 2024. Materials Science and Engineering A 779, 139116. Christ, H.J. ed., 2018. Fatigue of Materials at Very High Numbers of Loading Cycles: Experimental Techniques, Mechanisms, Modeling and Fatigue Life Assessment. Springer. Yadav, V.K., Gaur, V., Singh, I.V., 2022. Combined effect of residual and mean stresses on fatigue behavior of welded aluminum 2024 alloy. International Journal of Fatigue 155, 106565. Gaur, V., Briffod, F., Enoki, M., 2020. Micro-mechanical investigation of fatigue behavior of Al alloys containing surface/superficial defects. Materials Science and Engineering A 775, 138958. Sutton, M.A., Reynolds, A.P., Wang, D.Q., Hubbard, C.R., 2002. A study of residual stresses and microstructure in 2024-T3 aluminum friction stir butt welds. Journal of Engineering Materials & Technology 124, 215-221. Bussu, G., Irving, P.E., 2003. The role of residual stress and heat affected zone properties on fatigue crack propagation in friction stir welded 2024 T351 aluminium joints. International Journal of Fatigue 25, 77-88. Biallas, G., 2013. Effect of welding residual stresses on fatigue crack growth thresholds. International journal of fatigue 50, 10-17. Kang, J., Fu, R.D., Luan, G.H., Dong, C.L., a He, M., 2010. In-situ investigation on the pitting corrosion behavior of friction stir welded joint of AA2024-T3 aluminium alloy. Corrosion Science 52, 620-626. Niu, P.L., Li, W.Y., Li, N., Xu, Y.X., Chen, D.L., 2019. Exfoliation corrosion of friction stir welded dissimilar 2024-to-7075 aluminum alloys. Materials Characterization 147, 93-100. Moreto, J.A., dos Santos, M.S., Ferreira, M.O.A., Carvalho, G.S., Gelamo, R.V., Aoki, I.V., Taryba, M., Bose Filho, W.W. , Fernandes, J.C.S., 2021. Corrosion and corrosion-fatigue synergism on the base metal and nugget zone of the 2524-T3 Al alloy joined by FSW process. Corrosion Science 182, 109253. Jariyaboon, M., Davenport, A.J., Ambat, R., Connolly, B.J., Williams, S.W., Price, D.A., 2007. The effect of welding parameters on the corrosion behaviour of friction stir welded AA2024-T351, Corrosion Science 49, 877-909. Li, Ni., Li, W., Xu, Y., Yang, X., Alexopoulos, N.D., 2018. Influence of rotation speed on mechanical properties and corrosion sensitivity of friction stir welded AA2024-T3 joints. Materials & Corrosion 69, 1016-1024. Fratini, L., Pasta, S., Reynolds, A.P., 2009. Fatigue crack growth in 2024-T351 friction stir welded joints: Longitudinal residual stress and microstructural effects. International Journal of Fatigue 31(3), 495-500. Kumar, P. and Prashant, K., 2009. Elements of fracture mechanics. Tata McGraw-Hill Education.