Merchant ships are generally built by joining steels with various welding methods. When the methods used in shipyards examined, it is seen that gas metal arc (GMAW), submerged (SAW), covered electrode and tungsten inert (TIG) come to fore. In assembly of ship hull sheets, GMAW SAW preferred. this sense, extremely important characterize mechanical properties weld zone after shipbuilding steel jo...

In this study, DD13 sheet materials used in automobile swing manufacturing were welded with GMAW (Gas Metal Arc Welding) welding method different parameters such as method, amperage, and speed. The optimized value of the parameters, which will give lowest hardness weld seam hardness, was calculated by Taguchi method. addition, heat input values that are thought to affect change calculated, resu...

Large portions of infrastructure buildings, for example highway- and railway bridges, are steel constructions reach the end their service life, as a reason an increase traffic volume. As lifetime extension commonly used weld detail (transverse stiffener) these structures, validated approach repair was proposed in this study. For this, welded joints made S355J2+N S960QL steels were subjected to ...

In the magnetically controlled Plasma-GMAW welding process, composite arc forms a keyhole in workpiece to be welded. order explore effect of process parameters on coupling, weld pool and keyhole, behavior characteristics side information were collected using acquisition system high-speed camera during bead-on-plate welding. The image is processed by pseudo-color enhancement technology, molten a...

Invar 36 alloy is of high interest in various industrial sectors, due to its reduced thermal expansion properties. This study aims validate Wire-Arc Additive Manufacturing (WAAM) technology as a valid method for manufacturing aerospace tooling 36. The main novelty and the objective this work properties deposited by WAAM provide guidelines manufacture parts using technology. To do so, behaviour ...

Rapid prototyping (RP) methods are used for production easily and quickly of a scale model of a physical part or assembly. Gas metal arc welding (GMAW) is a widespread process used for rapid prototyping of metallic parts. In this process, in order to obtain a desired welding geometry, it is very important to predict the weld bead geometry based on the input process parameters, which are voltage...

During arc welding, the arc heats and melts the workpiece as heat flux. When the welding current is given, the distribution and the intensity of the heat flux are determined by the length of the arc. The measurement and control of the arc length are fundamental in robotic and automated welding operations. Length of welding arc determines the distribution of the arc energy and thus the heat inpu...

A nondestructive study of the internal structure and compositional gradient of dissimilar metal-alloy welds through energy-resolved neutron imaging is described in this paper. The ability of neutrons to penetrate thick metal objects (up to several cm) provides a unique possibility to examine samples which are opaque to other conventional techniques. The presence of Bragg edges in the measured n...

A new generation of arc welder has recently become widely available at a price which is within reach of most amateurs and part-time mechanics, known as the MIG welder (metal-arc inert gas welder). In MIG welding the arc is ensheathed in a stream of inert gas which prevents the molten metal from oxidising. The stream of gas changes the character of the emitted radiation, and it is possible that ...

Results from a computational model of arc welding, in which the arc plasma, workpiece and electrode are treated self-consistently, are presented. It is demonstrated through three examples (the effect of shielding gas composition, metal vapour and electrode shape on the weld pool) that reliable prediction of weld pool depth and geometry requires that the arc plasma is included in the computation...