Publications Scientifiques
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Item Assessment of friction stir welding joints of aa2017-t4 aluminum by disc pressure mechanical tests(2023) Djili, Abderrahmane; Bezzazi, Boudjema; Haboussi, Mohamed; Zioui, NadjetPrecipitation hardening aluminium alloy sheets AA2017-T4 are welded by FSW on a conventional FSW tool. A macrograph of the cross section of the butt-welded joint shows the classical zones for such welding, namely the nugget zone, the thermo-mechanically affected zone and the heat affected zone. Scanning Electron Microscopy displays a grain refining and a re-formation of the precipitates in the nugget zone. Micro-hardness measurements on the cross-section perpendicular to the welding direction give the standard W-profile of the hardness for such welding, with as expected, the relatively highest value at the joint center (nugget zone). To assess the mechanical performance of the FSW welded joint, the Disk Pressure Test (DPT) is used. It shows a failure pressure for the welded specimen that is 17% lower than the base material. The fracture surface micrographs clearly show a thickness reduction at break that is ~36% higher for the base material than the welding joint and a ductile fracture mode for both specimens.Item Characterization of the interface of a Non-Ferrous dissimilar realized by rotary friction welding(Springer, 2021) Mebtouche, A.; Bezzazi, Boudjema; Ramou, N.; Aboudi, D.; Faci, Y.; Latef, M.The need for assembly between dissimilar materials often arises in complex industrial applications. It avoids problems inherent in conventional welding. Therefore, in this study the performance of welded joints developed using a rotary friction welding machine, between Cu/Al, are characterized. The interface of the welded assembly of dissimilar copper Cua1 and AA2014 aluminum, consists of several intermetallic compounds mainly CuAl2, CuAl and Cu9Al4. Dendrites have been revealed, this structure is known to be the result of solidification. While rotary friction welding is done at the solid state. In this work, we seek to know the phenomena that take place during the entire process and in the creation of the interface. This article presents the study of the Al/Cu interfacial structure of welded joints made by rotary friction in a modified cycle with two stepsItem Etude expérimentale du comportement diélectrique et thermique des nano composites hybrides à matrice époxyde chargée(2014) Irekti, Amar; Bezzazi, Boudjema; Aribi, Chouaib; Zibouche, FatimaItem Rheological behavior of epoxy resin filled fume silica(2014) Irekti, Amar; Bezzazi, Boudjema; Aribi, Chouaib; Hami, B.