Failure analysis of dissimilar thickness resistance spot welded joints in dual-phase steels during tensile shear test

Characteristics of the Resistance Spot Welding Joints in Dissimilar Thickness Dual-phase Steels

“…The existence of these softening regions affects the failure location during the tensile shear test, and one of the important characteristics is the crack initiation location of the welded joints. 12,13) The performance of vehicle structures depends partly on the quality of welds, and nugget diameter has the most important influence on the fracture behavior of spot-welded joints. A small nugget often results in interfacial failure (IF) Table 1.…”

Bearing Capacity of Resistance Spot Welding Under Conditions of Europe, Indonesia

“…Taking into consideration the importance of various climatic conditions is evident from experiments made by Müller and Herak (2013) who judged the environment eff ects on the strength of the adhesive bonds exposed during 8 months (graded a er 2 months) to the Indonesian tropical climate conditions, concretely of three regions, which diff ered in altitude, daytime temperature and relative humidity. The common criterion of the average weld nugget diameter is equal to a fourth rout of the material thickness (where t is the material thickness in mm), which pullout failure is guaranteed in the tensile shear test (Zhang et al, 2014). According to a calculation of Honggiang et al the maximum nugget diameter should be 4 mm.…”

“…Resistance spot welding is a very eff ective method to join two or more metal sheets together with heat produced by welding current and it is widely used in automotive industry (Zhang et al, 2014). The stiff ness, strength and integrity of the vehicle constructions depend in part on the quality of the resistance spot welds.…”

Microstructure and Failure Analysis of Resistance Projection Welding of Nuts to AHSS with Capacitor Discharge Welding

“…The formations of the shrinkage and solidification cracks reduce the joint strength. 17,18) To determine how these defects impact the failure of joints, Fig. 13(a) presents a typical fracture morphology of a joint that failed in the IF mode with the shrinkage void.…”