Electron-Beam Welding of Titanium and Ti6Al4V Alloy

Kotlarski, Georgi; Kaisheva, Darina; Ormanova, Maria; Stoyanov, Borislav; Dunchev, V. P.; Anchev, A. P.; Valkov, Stefan

doi:10.3390/met13061065

Cited by 4 publications

(6 citation statements)

References 40 publications

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Section: Resultsmentioning

confidence: 84%

“…In either case, however, the tensile properties of the samples were highly similar and comparable. In addition, they improved over the ones of similar welds formed without the presence of fillers [27]. The stress-strain curves of the samples are presented in Figure 12, and the quantitative data are presented in Table 5.…”

Section: Resultsmentioning

confidence: 90%

“…The stress-strain curves of the samples are presented in Figure 12, and the quantitative data are presented in Table 5. When comparing the three samples with filler and the sample without filler [27], the influence of the beta-stabilizing fillers is clearly visible. The specimen welded with the vanadium filler showed the highest values of yield strength and ultimate tensile strength, as well as a high value of relative deformation.…”

Section: Resultsmentioning

confidence: 99%

“…This is applicable in all cases where electronbeam welding and laser-beam welding are concerned. Prior investigation was performed where the possibility of welding CP-Ti and Ti64 was studied, and successful welds were formed [27]. The samples in that work showed excellent mechanical properties in the form of microhardness and tensile strength.…”

Section: Introductionmentioning

confidence: 99%

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Electron-Beam Welding of Titanium and Ti6Al4V Using Magnetron-Sputtered Nb, V, and Cu Fillers

Kotlarski,

Kaisheva,

Anchev

et al. 2024

Metals

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In this work, the results of an investigation of electron-beam-welded samples of commercially pure titanium (CP-Ti) and the titanium alloy Ti6Al4V (Ti64) using fillers of various beta-stabilizing elements (Nb, V, Cu) are presented. The fillers were in the form of deposited layers on each of the two specimens via DC magnetron sputtering. The specimens were then subjected to electron-beam welding (EBW) under the same technological conditions. The structure of the obtained welded joints was investigated by scanning electron microscopy (SEM). X-ray diffraction (XRD) was used to investigate the phase composition of the fusion zone (FZ). The study of the mechanical properties of the samples was carried out via tensile tests and microhardness measurements. The results showed a different influence of the used fillers on the structure and properties of the obtained joints, and in all cases, the yield strength increased compared to the samples welded using the same technological conditions without the use of filler material. In the case of using Nb and V as a filler, the typical transformation of titanium welds into elongated αTi particles along with α’-Ti martensitic structures was observed. The addition of a Cu filler into the structure of the welds resulted in a unification and refining of the structure of the last, which resulted in the improvement of the mechanical properties of the weld, particularly its ductility, which is a known issue where electron-beam welding is concerned.

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Section: Resultsmentioning

confidence: 84%

Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Electron-Beam Welding of Titanium and Ti6Al4V Using Magnetron-Sputtered Nb, V, and Cu Fillers

Kotlarski,

Kaisheva,

Anchev

et al. 2024

Metals

Self Cite

View full text Add to dashboard Cite

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“…A number of methods for welding and joining exist, namely, friction stir welding [10][11][12][13][14][15], diffusion welding [16][17][18][19], explosive welding [20][21][22], laser beam welding [23][24][25][26], and electron beam welding [27][28][29][30][31][32]. In Ref.…”

Section: Introductionmentioning

confidence: 99%

Welding of Ti6Al4V and Al6082-T6 Alloys by a Scanning Electron Beam

Anchev,

Kaisheva,

Kotlarski

et al. 2023

Metals

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This work presents the results of an investigation into the influence of beam offset on the structure and mechanical properties of electron-beam-welded joints between Ti6Al4V and Al6082-T6 alloys. The experimental procedure involved the use of specific technological conditions: an accelerating voltage of 60 kV, an electron beam current of 35 mA, a specimen motion speed of 10 mm/s, and a beam offset of 0.5 mm towards both alloys, as well as welding without an offset. The phase composition of the joints was analyzed using X-ray diffraction (XRD). The microstructure and chemical composition of the seams were studied by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). The results obtained for the structure of the joints show that the beam offset has a significant influence on the structure. The microhardness was studied by means of the Vickers method. The results for the microstructure showed that the welding procedure without offset and with an offset towards the Ti alloy leads to inhomogeneous welded joints with a significant amount of intermetallics. The offset towards the Al alloy leads to the formation of a narrow area of TiAl3 phase. The measured microhardness corresponds to the increased amount of intermetallics in the case of offset towards the Ti alloy, with which the highest values were presented (about 58% higher than with Ti6Al4V plate). The results obtained for tensile properties show that the offset to the Al6082-T6 alloy leads to the highest values of tensile strength (TS) and yield strength (YS), which are twice higher than in welding without offsetting of the electron beam.

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Effect of the beam oscillation on the structure and mechanical properties of electron beam welded joints of Ti6Al4V and Al6082-T6 alloys

Kaisheva,

Dunchev,

Anchev

et al. 2024

J. Phys.: Conf. Ser.

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The results of electron beam welding of Ti6Al4V and Al6082-T6 alloys are presented. The influence of electron-beam scanning geometry on the structure and mechanical properties of the welded joint is studied. Two kinds of samples were investigated – the first specimen was welded without beam oscillation and the second one was obtained using an oscillating electron beam following a circular trajectory of scanning with an oscillation radius of 0.2 mm. X-ray diffraction (XRD) method was used for the determination of the phase composition of the welded joints. The microstructure of the welded joints was studied using Scanning electron microscopy (SEM). Energy-dispersive X-ray spectroscopy (EDX) was applied for the chemical composition investigation. Tensile experiments and microhardness measurements were performed to study the mechanical properties of the welded joints. The sample welded without the application of an oscillating beam showed higher values for the yield strength and tensile strength. The values measured for the microhardness within the welded seam are about 450 HV0.05 in both cases. However, the application of a beam oscillation leads to a significant increase in the micro-hardness of the heat affected zone at the Ti-based alloy. The measured values reached 627 HV0.05.

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Electron-Beam Welding of Titanium and Ti6Al4V Alloy

Cited by 4 publications

References 40 publications

Electron-Beam Welding of Titanium and Ti6Al4V Using Magnetron-Sputtered Nb, V, and Cu Fillers

Electron-Beam Welding of Titanium and Ti6Al4V Using Magnetron-Sputtered Nb, V, and Cu Fillers

Welding of Ti6Al4V and Al6082-T6 Alloys by a Scanning Electron Beam

Effect of the beam oscillation on the structure and mechanical properties of electron beam welded joints of Ti6Al4V and Al6082-T6 alloys

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