Effect of Inverter Power Source Characteristics on Welding Stability and Heat Affected Zone Dimensions

Il’yaschenko, Dmitriy P.; Chinakhov, D. A.; Mamadaliev, R.A.

doi:10.1088/1755-1315/115/1/012041

Cited by 5 publications

(2 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The analysis of studies by other authors devoted to welding of titanium alloys shows the following. As in welding of steels and alloys [36][37][38][39][40][41], to achieve the required quality characteristics of welded joints, an integrated approach to research methods is required [42][43][44]. This approach includes a comprehensive consideration of the processes at different stages: alloy fabrication [45][46][47][48][49][50]; study of the processes occurring directly during welding [51][52][53]; studying the influence of the welding thermal cycle and reducing of weld metal alloying degree on the structure and mechanical properties of welded joints [6,8,10,12,20,40]; study of the stress-strain state of welded joints after welding [1,13,15,20,54,55]; taking into account the specifics of manufacturing structures [1,2,4,13,16,[19][20][21][22] and so on.…”

Section: Introductionmentioning

confidence: 99%

Structure and Properties of High-Strength Titanium Alloy Ti-6.5Al-3Mo-2.5V-4Nb-1Cr-1Fe-2.5Zr Welded Joints

Akhonin

Belous

Selin

et al. 2021

SSP

View full text Add to dashboard Cite

As intensive work is underway in leading material science centers in the USA, EU, Russia, and China, both to modernize existing titanium alloys and to create new ones, the E.O. Paton Electric Welding Institute of the National Academy of Sciences of Ukraine developed titanium alloys T110 (Ti-5.5Al-1.2Mo-1.2V-4Nb-2Fe-0.5Zr system) and T120 (Ti-6.5Al-3Mo-2.5V-4Nb-1Cr-1Fe-2.5Zr system), which according to their characteristics, belong to the group of modern two-phase high-alloyed alloys characterized by high strength and good ductility. With more and more attention is being paid to the expansion in the usage of welded structures and assemblies of high strength titanium alloys with UTS ≥ 1100 MPa, there’s urgent need in studying best ways to obtain welded joints from such alloys. The weldability of two-phase high-alloyed titanium alloys, the use of which can give big reduction in structural weight, is significantly worse than low-alloyed alloys, therefore for a new alloy it is necessary to ensure the possibility of obtaining welded joints with a strength of at least 90% compared to the strength of base material. The aim of this work is to study the influence of the welding thermal cycle and reducing of weld metal alloying degree on the structure and mechanical properties of welded joints of high-strength titanium alloy Ti-6.5Al-3Mo-2.5V-4Nb-1Cr-1Fe-2.5Zr with tensile strength more than 1200 MPa, as well as assessment of it welded joints properties in comparison with other high-strength titanium alloys.

show abstract

Section: Introductionmentioning

confidence: 99%

Structure and Properties of High-Strength Titanium Alloy Ti-6.5Al-3Mo-2.5V-4Nb-1Cr-1Fe-2.5Zr Welded Joints

Akhonin

Belous

Selin

et al. 2021

SSP

View full text Add to dashboard Cite

show abstract

“…Argon arc welding [27][28][29][30][31][32][33][34][35][36][37], which is currently used in repairs, is characterized by increased heat input in the welded parts and insufficient concentration of the heat source, compared to laser welding [38][39][40][41][42][43][44][45]. The shape coefficient of the weld (the ratio of the width of the weld to its depth of penetration) in argon arc welding is 2…4.…”

Section: Introductionmentioning

confidence: 99%

Research of Technology for Repair of Heat Exchangers of Nuclear Power Plants by Laser Welding

Bernatskyi

Sydorets

Berdnikova

et al. 2021

SSP

View full text Add to dashboard Cite

Extending the lifetime of energy facilities is extremely important today. This is especially true of nuclear power plants, the closure (or modernization) of which poses enormous financial and environmental problems. High-quality repair of reactors can significantly extend their service life. One of the critical parts is heat exchangers, the tubes of which quite often fail. Sealing, as a type of repair of heat exchanger tubes by the plugs, is promising provided that the joint quality is high. Practical experience in the use of welding to solve this problem has shown the need to search technological solutions associated with increasing the depth of penetration and reducing the area of thermal effect. The aim of the work was to develop a highly efficient technology for repair and extension of service life of heat exchangers of nuclear power plants based on the results of studying the technological features of laser welding of joints of dissimilar austenitic steels AISI 321 and AISI 316Ti in the vertical spatial position. Based on the results of the analysis of mechanical test data, visual and radiographic control, impermeability tests and metallographic studies of welded joints, the appropriate modes of laser welding of plugs have been determined. The principal causes of defects during laser welding of annular welded joints of dissimilar stainless steels are determined and techniques for their elimination and prevention of their formation are proposed. Based on the results of the research, technological recommendations for laser welding of plugs in the heat exchange tube of the collector are formulated, which significantly improves the technology of repair of steam generators of nuclear power plants and extends the service life of reactors.

show abstract

High geometric fidelity through closed-loop control of the weld pool size in gas metal arc welding based direct energy deposition

Scheck,

Richter,

Beitler

et al. 2024

Additive Manufacturing

View full text Add to dashboard Cite

Effect of Inverter Power Source Characteristics on Welding Stability and Heat Affected Zone Dimensions

Cited by 5 publications

References 6 publications

Structure and Properties of High-Strength Titanium Alloy Ti-6.5Al-3Mo-2.5V-4Nb-1Cr-1Fe-2.5Zr Welded Joints

Structure and Properties of High-Strength Titanium Alloy Ti-6.5Al-3Mo-2.5V-4Nb-1Cr-1Fe-2.5Zr Welded Joints

Research of Technology for Repair of Heat Exchangers of Nuclear Power Plants by Laser Welding

High geometric fidelity through closed-loop control of the weld pool size in gas metal arc welding based direct energy deposition

Contact Info

Product

Resources

About