Flash butt welding is a resistance process that offers great advantages due to its high thermal efficiency, simplicity and speed, makes it ideal for mooring chains. Despite advantages, numerous corrosion problems are still being found in practice, both the heat-affected zone weld line. Literature scarce about it, limiting mostly state problem. The majority of studies attribute this preferential...

For hot extrusions of magnesium alloy sheets, Dissimilar AZ80 and AZ31 were used, in which AZ80 was placed on advancing side and AZ31 on retreating side, using friction stir butt welding with different process parameters. Some defect-free welded joints with good weld surfaces could be obtained with some suitable welding conditions. The maximum tensile strength of welded joint which is 225.5 MPa...

Gas tungsten arc welding is the primary process for precision joining. To develop a control system for this process, a novel sensor is proposed to measure the depth of the weld pool surface using a non-transferred arc. A flat surface is periodically established to provide a real-time reference. The main-arc-on period is selected as the system’s input. Because of possible large variations/ranges...

In modern design of automobile car bodies reduction in weight and maximization of the structural stiffness and passive safety are the main challenge. The ‘Tailored Blank’ has contributed to achieve a significant weight reduction in recent years. The single flat sheets are joined by Laser Welding in butt configuration without filler wire. Usually the quality of the welds is assured by precise pr...

The variety of vision inspection systems for welding defects in the present manufacturing scenario is needed for overcoming certain limitations such as the problem of inaccuracy in the images, non-uniformed illumination, noise and deficient contrast, and confusion in defects if they occur in the same spot at the surface and subsurface. Hence, it is imperative to design a new vision inspection s...

A multiphysics computational model has been developed for the conventional Gas Metal Arc Welding (GMAW) joining process and used to analyze butt-welding of MIL A46100, a prototypical high-hardness armor martensitic steel. The model consists of five distinct modules, each covering a specific aspect of the GMAW process, i.e., (a) dynamics of welding-gun behavior; (b) heat transfer from the electr...

Friction stir welding (FSW) is a relatively new, solid-state, metal joining process invented by Wayne Thomas et al. at the Welding Institute of England (now TWI) in 1991 [1.] A FSW butt weld is made by following the joint-line of two butted pieces of material with a rotating tool while applying a significant down-force through the tool. Heating is provided at or near the tool-work interface by ...

Friction stir spot welding (FSSW) of dissimilar S45C steel and 6061-T6 aluminum alloy in a butt configuration is experimentally investigated. Butt performed using convex scrolled shoulder tool at different rotational speeds. FSSW joints are successfully fabricated by offsetting the to side. The microstructures three speeds characterized scanning electron microscopy energy dispersive spectrometr...