Development of a novel GTAW process for joining ultra-thin metal sheets

Manh, Ngo Huu; Nguyen, Van Anh Thi; Han, Duy Le; Murata, Akira; Le, Van Thao; Ngoc, Trinh Quang; Gandham, Bharat

doi:10.1016/j.jmapro.2022.06.043

Cited by 15 publications

(2 citation statements)

References 26 publications

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“…Its low heat input (HI), compared to other welding processes, allows for the joining of even thin materials. [36][37][38] Moreover, proper control of operating parameters will enable the production of robust joints with an appropriate ferrite-austenite balance. [39][40][41][42][43][44] According to various standards and research, it has been reported that austenite contents below 30% are inadequate for most industrial applications.…”

Section: Introductionmentioning

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: Introductionmentioning

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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“…It has a layer of aluminium oxide on its surface, so it must be destroyed before welding. Aluminium has good weldability and cutting capabilities [4], [5], and Gas Tungsten Arc Welding (GTAW) has become a standard method for this material [6]. GTAW is usually used on light metals such as magnesium, aluminium, and stainless steel [7], [8].…”

Section: Introductionmentioning

confidence: 99%

Analysis of tensile strength and microstructure on GTAW- Aluminum 6061 welding results

Fakhri

Basyirun²,

Fikrie³

2022

JEATech

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The process of joining aluminum metal requires a special welding method. The use of GTAW welding is a suitable method for joining aluminum plates. This research is intended to analyze the tensile strength and microstructure of the GTAW Aluminum 6061 welding with various currents. The research method used in this research is experimental research. Welding current variations used in this study were 100A, 115A, and 130A, then tested using a destructive test, tensile test. The data analysis used in this study is descriptive analysis, where the data obtained are averaged and then described and concluded. The results of microstructure research on GTAW welding show that changes in the microstructure are very visible in the HAZ area and the weld metal, the greater the heat input, the more spread the Mg2Si grains will be. Good structural dispersion only occurs at 130A current. This is different from the base metal which does not change the material structure at all. Based on the tensile test, the tensile stress value is 80.9 MPa at 100 A current, 84.9 MPa at 115A current variation, and the highest tensile strength is 86.7 MPa at 130A current. So, it can be concluded that the higher the current used, the better the microstructure and tensile strength produced.

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Arc characteristics and welding state in gas-focusing TIG

Liu,

Zhang

2023

Int J Adv Manuf Technol

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Development of a novel GTAW process for joining ultra-thin metal sheets

Cited by 15 publications

References 26 publications

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

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

Analysis of tensile strength and microstructure on GTAW- Aluminum 6061 welding results

Arc characteristics and welding state in gas-focusing TIG

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