20.500.12556/RUL-137698 Microstructure and fatigue properties of resistance element welded joints of DP500 steel and AW 5754 H22 aluminum alloy The modern concept of lightweight design (LW) requires the application of different materials in one structure (multi-material structures). The structure of different materials has a good perspective for application in the automotive and aerospace industries but only if it is possible to achieve a quality joint between different materials. The most used technology for joining different materials in the automotive industry is Resistance spot welding (RSW). Due to different mechanical, physical, and chemical properties, the joining of different materials by RSW technology does not provide a quality joint, and accordingly, alternative technologies for joining different materials have emerged. Resistance element welding (REW) was developed to enable joint of different materials. This paper presents the welding of AW 5754 H22 Al alloy (1.0 mm-thick) and DP500 steel (1.5 mm-thick) using novel REW. The peak load, absorption energy, microstructure, microhardness and fatigue strength of the REW joint has been investigated. The joint of the same materials has been done also using conventional RSW to compare some results. The results that will be presented in this paper show that that REW can achieve reliable joining of the two materials at relatively low welding currents compared to RSW. Using REW process with a significantly lower welding current, satisfactory mechanical characteristics of the weld joint can be achieved, so peak load is between 2300–2500 N, displacement is between 2.5–3 mm and the absorption energy is between 3.3–5.7 J. REW joints showed fatigue strength with the fatigue limit of 882 N. resistance spot welding resistance element welding dissimilar materials joints microstructure microhardness fatigue strength uporovno točkovno varjenje mikrostruktura mikrotrdota spoji true false true Angleški jezik Slovenski jezik Članek v reviji 2022-06-28 09:53:17 2022-06-28 09:53:22 2022-09-15 04:15:40 0000-00-00 00:00:00 2022 0 0 15 str. iss. 2, art. 258 Vol. 12 Feb. 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.791 2073-4352 10.3390/cryst12020258 112978691 Duric_..._-Microstructure_and_fatigue_properties_of_resistance_element_welded_joints_of_DP500_steel_and_AW_5754_H22_aluminum_alloy.pdf Duric_..._-Microstructure_and_fatigue_properties_of_resistance_element_welded_joints_of_DP500_steel_and_AW_5754_H22_aluminum_alloy.pdf 1 97F038AFCF6EB68F272666EE5585D863 b3e451dd71b79ff9e8b774872704bfd23e97c5325609bf17697581a5d37fa640 254b6c3a-f6b8-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=157738 https://www.mdpi.com/2073-4352/12/2/258 1 2eb93a77-f6b7-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=157737 Fakulteta za strojništvo 0 0 0