Variety of ultra-high strength steels (UHSS) with different microstructural characteristics is becoming available continuous development the manufacturing process in steel industries. In order to effectively design structures made such grades, a detailed knowledge mechanical properties vital. Fire safety one areas which essential. Welding indispensable construction inevitable welding-induced de...

Hexavalent chromium [Cr(VI)] and ozone are produced in many arc-welding processes. Cr(VI) is formed when welding with chromium-containing alloys and is a suspected carcinogen. Ozone is formed by the action of ultraviolet light from the arc on oxygen and can cause severe irritation to the eyes and mucous membranes. Previous work has demonstrated that reduction of sodium and potassium in manual m...

this paper presents a new arc starter circuit that is usable in manual metal arc welding (mma) power supplies. the proposed circuit uses an auxiliary circuit and a series coupling transformer for adding high frequency spikes to output dc voltage during arc striking. the proposed circuit is usable in inverter based arc welding supplies and it could result in a decrease of weigh, volume and expen...

In fields, such as oil and gas pipelines nuclear power, narrow-gap welding has often been used for the connection of thick medium-thick plates. During process, a lack fusion was prone to occur due groove size limitations, seriously affecting service safety large structures. The vertical oscillation arc pulsed metal (P-GMAW) method adopted in this study. influence width on morphology, droplet tr...

The processes of metal additive manufacturing (AM) are no longer confined to rapid prototyping applications and seeing increasing use in many fields for the production tools finished products. ability design parts with practically zero waste, high precision, complex geometry, on-demand fabrication among advantages this approach. One drawbacks technique is productivity rate, as made layer by lay...

This article presents the effects of shielding gas compositions on the transient transport phenomena, including the distributions of temperature, flow velocity, current density, and electromagnetic force in the arc and the metal, and arc pressure in gas metal arc welding of mild steel at a constant current input. The shielding gas considered includes pure argon, 75% Ar, 50% Ar, and 25% Ar with ...

Tungsten inert gas (TIG) welding, also called as gas tungsten welding 1. (a) Schematic of TIG welding Process (b) Variety of tungsten electrodes. The activated TIG (ATIG) welding process mainly focuses on increasing the depth of penetration and the reduction in the width of weld bead has not been paid. Tungsten inert gas welding, TIG is widely applied in manufacturing process for different The ...

This study investigates the impact of gas metal arc welding (GMAW) parameters on bead geometry and material distortion AISI 316L. Three parameters—arc current in ampere (A), filler feed rate (m/min), composition—were modified at varying levels order to examine their effects. sheds new light MAG lines’ physical properties behavior highlights influence quaternary shielding compositions. Taguchi a...

Wire arc additive manufacturing (WAAM) is advantageous for fabricating large-scale metallic components; however, a high geometric accuracy as that of other AM techniques cannot be achieved because the deposition process with large layer. This study focuses on WAAM based gas metal welding (GMAW). To clarify influence shielding used to protect molten during fabrication built part obtained via GMA...