Issue 47

K. Hachellaf et alii, Frattura ed Integrità Strutturale, 47 (2019) 459-467; DOI: 10.3221/IGF-ESIS.47.36 466 Fig. 9.: Variation of micro-hardness Vickers HV. C ONCLUSIONS he characterization of the mechanical behavior of the materials through the various tests carried out, the results obtained show the complex relationship between material and tool which contributes to the physicochemical change modified by several welding parameters such as the advance speed, the rotation speed and tool geometry. This study, we concluded that the behavior of the welded joint FSW strongly depends on the geometry of the tool which plays an important role with the chosen parameters. The union of all these parameters proves that FSW welding of HDPE gives very satisfactory and important results. It should be noted that the analysis of the results made it possible to understand the influence of the tool geometry and cutting parameters used in FSW. According to the results obtained, it is observed that the best results were obtained by the cylindrical profiled tool T2 which have a maximum efficiency of the weld of 14.94% compared to the base material, better than the tool T1 with a conical profile which reaches a efficiency of 7.94%, the cylindrical profile with a dynamic volume ratio produces better results than the conical profile are suitable to obtain a good quality of welding of thermoplastic materials such as HDPE. This work is a real experimental challenge. To do this, we have developed a technique for welding HDPE. With regard to the influence of tool geometry on FSW welding, tools T1 and T2 are suitable for obtaining good welding quality. R EFERENCE [1] Vijendra, B., Sharma, A. (2015). Induction heated tool assisted friction-stir welding (i-FSW): A novel hybrid process for joining of thermoplastics, J. Man. Proces. 20, pp. 234-244. DOI:10.1016/j.jmapro.2015.07.005. [2] Panneerselvam, K., Lenin, K. (2014). Joining of Nylon 6 plate by friction stir welding process using threaded pin profile, J. Mater. Design, 53, pp. 302–307. DOI: 10.1016/j.matdes.2013.07.017. [3] Hoseinlaghab, S., Mirjavadi, S.S., Sadeghian, N., Jalili, I., Azarbarmas, M., Givi, (2015). Influences of welding parameters on the quality and creep properties of friction stir welded polyethylene plates, J. Mater Design, 67, pp. 369–378. [4] Patel, A. R., Dalwadi, C.G. (2016). A Review: Dissimilar Material Joining of Metal to Polymer using Friction Stir Welding (FSW). Inter J. Sci. Technology & Engineering, 2(10), pp. 702-706. [5] Zafar, M., Awang, M., Raza Khan, S. (2017). Friction Stir Welding of Polymers. 2nd International Conference on Mechanical, Manufacturing and Process Plant Engineering, Lecture Notes in Mechanical Engineering, pp. 19-36. DOI 10.1007/978-981-10-4232-4_2. [6] Lorrain O., ed., (2010). Analyses expérimentale et numérique du procédé de soudage par friction malaxage FSW, Paris Tech, Thèse de doctorat, l’Ecole Nationale Supérieure d'Arts et Métiers, Paris Tech. [7] Zhou, C., Yan, X., Luan, G. (2005). Fatigue properties on friction stir welding in Al 5083, J. Scripta Materialia, 53(10), pp.1187-1191. DOI 10.1016/j.scriptamat.2005.07.028.