The effect of holding time on dissimilar metal in the spot welding

• Main Authors: Alreza, Yanida Dwiki, Hendrawan, Muh Alfatih
• Format: Conference Proceeding
• Language: English
• Subjects: Contact melting; Density; Dissimilar metals; Lap joints; Low carbon steels; Resistance spot welding; Shear strength; Tensile strength; Tensile tests; Welded joints; Welding parameters; Zinc
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0179955

Resistance spot welding has the concept of joining two or more metals, by emphasizing the electrodes that are electrified, causing heat in the contact area so that the material will melt. In this article, will describe the results of research on the effect of holding time variations on Resistance Spot Welding for mild steel AISI 1008 series and aluminum 3000 series, zinc powder mesh 200 for filler with locator on each material. The tested things were connected by the ASME IX standard lap joint configuration with zinc on both material locators. The parameter processes are weld time of 0.5 seconds, weld currents of 8000A and 9000A then the holding time in the range of 1 second, 3 seconds, and 5 seconds. Characteristics of the welded joint are investigated by shear tensile test, macro photo test and SEM-EDX test. The results showed tensile strength at the parameter of welding time 0.5 seconds, a current of 9000 A and holding time 1 seconds obtained a value of 380N, while at the holding time of 5 seconds the tensile strength obtained was 630N. In macro photo testing holding time of 1 second, the weld there is a wide cavity and low density. While the holding time of 5 seconds, the density is quite good. Holding time variations affect the tensile shear strength, joint density and nugget shape on the welded joint. Tensile strength of the welding joint obtained will be higher when the holding time is getting longer.