Optimization of RSW parameters by joining galvanized steel HZ 220 BD-Z100 MB with aluminium AV 1050A

Abstract

The main trend in the automotive industry today is the reduction in vehicle weight. The problem is addressed first and foremost by the use of different types of light and high strength materials in the production of the car body. Although galvanized steel sheet is still the basic construction material, nowadays aluminium alloy sheets are increasingly used in the production of vehicles. This paper is focused on the optimization of process parameters by resistance spot welding dissimilar materials: galvanized steel sheet and sheet made of aluminium.K e y w o r d s : resistance spot welding, steel/aluminium joints, weld nugget, properties

Effects of welding parameters on tensile properties and failure modes of resistance spot welded DC01 steel

“…Expulsion formation causes deterioration of the welded joint quality. 33–35 Although the highest TSF value was obtained at 12 kA–2.94 kN welding parameters, expulsion occurred (Figure 6(a)). So, it was seen that higher WC and EF values than 12 kA–2.94 kN welding parameters would not give quality joints.…”

“…This can cause micro-void formation (Figure 4(a)). 35,46,47 EDS analysis was carried out to examine if there were differences in the chemical composition of RSW specimens. Supplementary Figure 11 indicates SEM micrographs taken from specimens that were welded by using 8 kA-1.96 kN and 12 kA-2.94 kN welding parameters, and Supplementary Table 7 indicates EDS results.…”

Optimization of resistance spot welding with surface roughness dissimilar mild steel with stainless steel

“…In addition to roughness affecting the flow of electricity, the conductivity of the material is also very influential where during the flow of electric current between the electrodes (due to the very different electrical conductivity of the material used), the highest concentration of joule heat occurs in the center of the steel sheet. If the temperature exceeds the melting point of steel, then a certain amount of molten metal is formed in the form of nugget [20]. Fig.…”

“…Today, the industry is looking for high quality welded joints [19]. To optimize welding parameters, there are several parameters, including: the diameter of the weld nugget, which is evaluated by the peel test according to EN ISO 10440, this is also done in research [20], It can also be by testing the strength of the shear pull. This has been done by researchers in paper [21] One of the tests they did was shear tensile strength.…”