In the present research, the effects of spot-welding process parameters on the nugget diameter and electrode penetration depth of spot-welded joints were investigated. To achieve this, a spot-welded joint of three-thin sheet low carbon steels (same thicknesses of 0.8 mm) was simulated as an electerical-thermal-mechanical coupling of 3D finite element model. After validating the finite element s...

Abstract An efficient and productive joining technique to weld aluminium has become a priority challenge for promoting the use of in electrical industry. One challenges is obtain welds with superior mechanical properties consistent quality surface as well low resistance. In this paper, influence rotational speed during friction stir spot welding AA 5754-H111 was studied analyse welds. The resul...

To achieve good corrosion resistance in a weld is much more challenging than for plate or sheet material, which has undergone controlled rolling, heat treatment and pickling processes in the steel mill. The choice of weld procedure and parameters, filler metal and shielding gas all play important roles. For duplex and lean duplex grades it is essential to ensure that an adequate amount of auste...

This paper describes a threefold method of testing the performance of an array-based ultrasonic tool for nondestructive testing of spot welds. The tool is described in its capabilities, use, and advantages over existing counterparts. Performance testing is not only described, but results from carrying out the testing are documented as well. The three performance testing methods include the use ...

The design of most electric vehicles provides for the positioning heavy energy storage units in underbody cars. In addition to crash safety, battery housing has meet high requirements gas tightness. order test use high-strength steels this sub-assembly, paper examines welded joints utilizing resistance spot weld bonding and laser remote welding, with special regard tightness welds. For purpose,...

High strength steels Q690+Q550 were welded using three different welding wires without preheating by gas shielded arc welding process. Microstructural characteristics of weld metals and nucleation mechanism of acicular ferrite were investigated by means of scanning electron microscope (SEM), energy dispersive spectrum (EDS) and transmission electron microscope (TEM). The straight Y-groove test ...

In this study, a numerical approach was proposed to predict the failure of resistance spot welds, into which theoretical and empirical models as well finite element (FE) model are integrated. approach, hardness welds first evaluated estimated then used determine local mechanical properties. The weld geometry boundary conditions were faithfully followed when generating FE model. A Gurson-type da...

This paper reviews effects of amplitude and force control during the ultrasonic welding cycle of thermoplastics. In a previously published paper, the benefits of amplitude profiling were detailed as increased strength and reduced part marking. This paper reviews the mechanisms for such observations and details additional benefits, such as decreased residual stresses and increased solvent resist...