Applying the plasma process

Lucas, W. Scott

doi:10.1533/9780857093264.2.90

Cited by 5 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The laminar flow of gas ensures arc stability and better weldment shielding during welding. 13 The dissimilar welds were produced autogenously and using 2 mm CP-Ti wire as filler metal. All the process parameters other than current and electrode gap were kept same for both types of welds for nearly same heat input.…”

Section: Experimentationmentioning

confidence: 99%

“…The advantages of using GTAW process include the stable arc, ductile welds, and excellent control over heat input. 13,14 Depending upon the thickness of sheets being welded, welding using GTAW can be carried out with or without using filler metal. 3 Joint preparation and filler material is needed for welding sheet thickness more than 3 mm; however, sheet thickness up to 3 mm can be welded autogenously.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of microstructure evolution and mechanical properties of gas tungsten arc welded dissimilar titanium (CP-Ti/Ti–6Al–4V) alloys

Kumar

Mahto

Rana

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part E:

View full text Add to dashboard Cite

Economical welding of dissimilar titanium alloys has always been a challenge for the aerospace and nuclear industries, where these alloys are extensively used because of their high strength-to-weight ratio. The present investigation deals with the development of a novel shielding setup for the successful welding of commercially pure titanium (α-phase) to Ti–6Al–4V ((α + β)-phase) without any atmospheric contamination using gas tungsten arc welding. Commercially pure titanium (CP-Ti) and Ti–6Al–4V sheets of 3 mm thickness were butt-welded autogenously and using CP-Ti filler metal. Metallographic studies, energy-dispersive X-ray spectroscopy, X-ray diffraction analysis, microhardness measurements, tensile testing, and fractography were carried out to understand the evolution of the microstructure and characterize the welds. Grain coarsening in heat-affected zone and weld, and variation in the distribution of phases were observed from the optical micrographs and energy-dispersive X-ray spectroscopy spectrum of different zones. An unsymmetrical variation of hardness was observed in the weld region, and a 15% reduction in hardness value (280 HV0.2) was obtained at the weld center of using filler metal weld than autogenous weld. Comparable strengths with little drop from as-received CP-Ti (307 MPa) were observed for welded specimens. Welds produced using CP-Ti filler metal (272 MPa) had higher strength than autogenous welds (214 MPa). As-received tensile specimens fractured nearly from the center of gauge length, but welded tensile specimens fractured near the base/heat-affected zone boundary of the CP-Ti side.

show abstract

Section: Experimentationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of microstructure evolution and mechanical properties of gas tungsten arc welded dissimilar titanium (CP-Ti/Ti–6Al–4V) alloys

Kumar

Mahto

Rana

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part E:

View full text Add to dashboard Cite

show abstract

“…These include narrow gap, flux cored filler wire, immersed arc, twin arc, hot wire, K-GTAW and ATIG. 9,[16][17][18] Active flux tungsten inert gas and K-GTAW have received significant attention in recent years due to the deeply penetrating weldpool 3,16,[19][20][21] (Fig. 2).…”

Section: Gas Tungsten Arc Welding Process Overviewmentioning

confidence: 99%

“…A prominent example of this is the use of a low frequency pulsating current. 18 Welding is often autogenous, although a filler wire may also be used where the joint fit-up is poor or where joint preparation is required due to limited penetration capacity of the welding process (e.g. V, Y or X butt joints).…”

Section: Process Variablesmentioning

confidence: 99%

Gas tungsten arc welding of α + β titanium alloys: A review

Short¹

2009

Materials Science and Technology

113

View full text Add to dashboard Cite

Titanium alloys used in aerospace structures require joints of high integrity to meet the design requirements. Gas tungsten arc welding (GTAW), laser beam welding (LBW) and electron beam welding (EBW) are all processes capable of creating fusion welded joints. Gas tungsten arc welding offers the potential to achieve welds of equal quality to EBW or LBW at much lower capital costs; however, the application of GTAW involves gaining an understanding of the complex process characteristics. This paper reviews the process characteristics for GTAW titanium alloys and compares these characteristics with EBW and LBW titanium alloys. The characteristics of active flux tungsten inert gas welding and keyhole mode GTAW, two recent developments to GTAW, are considered, as is keyhole mode plasma arc welding. These variants are capable of greater penetration and, in some cases, faster processing speeds than conventional GTAW. Finally, the current knowledge of weld microstructural development in cast and wrought α + β titanium alloys and the mechanical performance of such welded joints are examined. Notably, conduction mode GTAWs are shown to have comparable mechanical properties with EBWs in relation to both cast and wrought base metals.

show abstract

“…Applying a flux coating containing specific inorganic compounds to the joint surface prior to welding can considerably improve the arc's ability to penetrate during TIG welding. [26][27][28][29][30][31][32][33][34][35][36][37]. According to [37], the A-TIG welding method may fully penetrate up to 12 mm in a single pass without the use of filler wire or bevel preparation.…”

Section: Introductionmentioning

confidence: 99%

Parametric optimization for hardness of tig welded duplex stainless steel

Mondal,

Kumar Bose

2023

Int. J. Ind. Optim.

View full text Add to dashboard Cite

Achieving optimal mechanical properties in welding joints hinges on employing precise parametric conditions. This is particularly crucial for Tungsten Inert Gas (TIG) welding of ASTM/UNS 2205 Duplex Stainless Steel (DSS), where attributes like hardness, ultimate tensile strength, and yield strength are paramount. Maintaining high Hardness Value (HV) demands proper welding parameters such as welding current, gas flow rate, and welding speed. To enhance DSS welding quality, especially hardness, this study utilizes the Taguchi method to optimize welding process parameters. The importance of each factor is assessed through Annova statistical analysis. The outcomes highlight the positive impact of parametric optimization on HV, as evidenced by the analysed data. Parametric optimization proves to be a potent approach for refining industrial processes like welding, with particular relevance in TIG welding of duplex stainless steel due to its mechanical robustness and corrosion resistance. Nevertheless, challenges arise due to the material's elevated hardness and low thermal conductivity, resulting in potential defects like cracks and porosity. The identification of optimal welding parameters, encompassing current, voltage, speed, and gas flow rate, helps address these challenges and advances high-quality welds. Through systematic variations and analysis of these parameters, researchers and engineers can pinpoint the optimal combination that mitigates defects while maximizing desired joint attributes. Within the realm of TIG welding of duplex stainless steel, metric optimization holds the potential to elevate welding quality, curtail costs and waste, and heighten productivity and safety. Consequently, organizations can attain enhanced performance, efficiency, and profitability within their welding processes

show abstract

Applying the plasma process

Cited by 5 publications

References 0 publications

Investigation of microstructure evolution and mechanical properties of gas tungsten arc welded dissimilar titanium (CP-Ti/Ti–6Al–4V) alloys

Investigation of microstructure evolution and mechanical properties of gas tungsten arc welded dissimilar titanium (CP-Ti/Ti–6Al–4V) alloys

Gas tungsten arc welding of α + β titanium alloys: A review

Parametric optimization for hardness of tig welded duplex stainless steel

Contact Info

Product

Resources

About