Recent developments in the design, development, and analysis of the influence of external magnetic-field on gas-metal arc welding of non-ferrous alloys: review on optimization of arc-structure to enhance the morphology, and mechanical properties of welded joints for automotive applications

Sharma, Pankaj; Chattopadhyaya, Somnath; Singh, Nirmal; Kumar, Ashok; Sharma, Shubham; Li, Changhe; Kumar, Vineet; Wojciechowski, Szymon; Królczysk, Grzegorz

doi:10.1016/j.heliyon.2022.e11812

Cited by 5 publications

(1 citation statement)

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“…The torch or electrode angle, welding position, arc length, or welding speed directly influences the fluid flow pattern in the weld area, thus affecting the weld bead shape and penetration. [ 56 ] However, an important aspect of this research is that during the welding of these materials, the addition of chemical elements with high activity such as oxygen, nitrogen, and sulfur, among others, through the protective atmosphere or fluxes, can influence the convective flow of the fluid and consequently the Marangoni convection mode. It is known that this heat transfer phenomenon, induced by surface tension in the welding pool, is the primary convection mode that influences the liquid zone of the joint.…”

Section: Resultsmentioning

confidence: 99%

Effect of Nitrogen‐Added Shielding Gas on Microstructure Evolution of Welded Joints by Gas Tungsten Arc Welding Process in Duplex Stainless Steel 2205

Rodriguez‐Vargas,

Stornelli,

Miranda Pérez

et al. 2024

steel research int.

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Duplex stainless steels (DSS), due to their high corrosion resistance, primarily attributed to their austenite‐ferrite duplex microstructure, are widely used in industrial sector such as petrolchimical and gas natural industries. Maintaining this microstructure is crucial during manufacturing processes, including welding which presents the challenge of minimizing ferritization in the heat‐affected zone (HAZ) or weld zone (WZ), as it can significantly reduce their corrosion resistance. This work aims to describe the influence of nitrogen gas in the Ar–N2 shielding atmosphere when depositing beads on 2205 DSS plates, using a gas tungsten arc welding (GTAW) process. It is observed that at low nitrogen load (98%Ar–2%N2), the austenite content reaches 49% in WZ and 29% in HAZ. When the nitrogen percentage is increased (50%Ar–50%N2), the austenite content rises to 67% and 37%, respectively. The joint is evaluated macro‐ and microstructurally to observe the atmosphere impact on weld bead geometry and microstructural development. Additionally, hardness is assessed throughout the weld bead. The work demonstrates that, with a 50%Ar–50%N2 shielding gas mixture, it is possible to limit the formation of ferrite in the WZ and HAZ of DSS during the welding process, without altering the microhardness trend of the welded joint.

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Section: Resultsmentioning

confidence: 99%