PSI - Issue 10

E. Dovletoglou et al. / Procedia Structural Integrity 10 (2018) 73–78 E. Dolvetoglou et al. / Structural Integrity Procedia 00 (2018) 000 – 000

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(c) Fig. 5. Fracture locations of electron beam welded joints of 2024-T3 aluminium alloy after the exposure to exfoliation corrosion environment for (a) 0 h, (b) 8 h and (c) 48 h.  an essential decrease in elongation at fracture was noticed for only 2 h exposure, thus referring to hydrogen em brittlement on the absence of surface pitting. Decrease of tensile elongation at fracture seems to follow an expo nential curve against corrosion exposure time,  fracture location of the welded joints always started from the root of the weld and for the small exposure times fracture occurred within the fusion zone. For the extreme exposure times (> 24 h), fracture path was in the inter phase of fusion zone and heat affected zone. Alexopoulos, N.D., Velonaki, Z., Stergiou, C.I., Kourkoulis, S.K., 2016. The effect of artificial ageing heat treatments on the corrosion-induced hydrogen embrittlement of 2024 (Al-Cu) aluminium alloy. Corrosion Science 102, 413-424. Çam, G. , Ventzke, V., Dos Santos, J.F., Koçak, M., Jennequin, G., Gonthier-Maurin, P., 2000. Characterization of electron beam welded aluminium alloys. Practical Metallography 37, 59-89. Kamoutsi, H., Haidemenopoulos, G.N., Bontozoglou, V., Pantelakis, S., 2006. Corrosion-induced hydrogen embrittlement in aluminum alloy 2024. Corrosion Science 48, 1209-1224. Lacki, P, Adamus, K., Wojsyk, K., Zawadzki, M., 2011. Numerical simulation of electron beam welding process of Inconel 706 sheets. Key Engineering Materials 473, 540-547. Matrukanitz, P.R., 1990. Selection and weldability of heat-treatable aluminum alloys, ASM Handbook -Welding, Brazing and Soldering 6, 528-536. Petroyiannis, P.V., Kermanidis, A.T., Papanikos, P., Pantelakis, Sp.G., 2004. Corrosion-induced hydrogen embrittlement of 2024 and 6013 aluminum alloys. Theoretical and Applied Fracture Mechanics 41, 173-183. Preston, R.V., Shercliff, H.R., Withers, P.J., Smith, S.D., 2003. Finite element modelling of tungsten inert gas welding of aluminium alloy 2024. Science and Technology of Welding and Joining 8, 10-18. Sun, Z., Karppi, R., 1996. The application of electron beam welding for the joining of dissimilar metals: an overview. Journal of Materials Processing Technology 59, 257-267. Wanjara, P., Brochu, M., 2010. Characterization of electron beam welded AA2024. Vacuum 85, 268-282. References