EBW of aluminium alloys with application of electron beam oscillation

Слива, А. П.; Драгунов, В. К.; Terentyev, E. V.; Goncharov, A. L.

doi:10.1088/1742-6596/1089/1/012005

Cited by 7 publications

(3 citation statements)

References 1 publication

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“…If the seam reinforcement value is ∆F > 0, such metal formation is considered favorable (Figure 3). The electron beam sweep parameters significantly affect the form of the weld, and with a sweep amplitude of 1.5 mm and frequency of 35 Hz, the weld has a reinforcement ∆F of about 2 mm 2 , which is consistent with previous studies [6][7].…”

Section: Methodssupporting

confidence: 89%

Non-destructive testing of physical and mechanical properties of local zones in welded joints

Matyunin

Sliva

et al. 2022

J. Phys.: Conf. Ser.

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The influence of the “saw-tooth” type electron beam sweep on the penetration shape during electron-beam welding of 30KhGSA high-strength steel with different welding modes was investigated. Using the instrumented indentation method, the distribution of Young’s modulus, as well as the characteristics of strength and plasticity in the welded joints cross-sections, was obtained. It has been found that in the weld metal there is a sharp increase in strength characteristics, while the plasticity ones are significantly reduced. The values of the Young’s modulus also varied over the cross-sections. The considerable decrease in this characteristic (up to 20%) was registered in the weld metal in comparison with the parent metal results.

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Section: Methodssupporting

confidence: 89%

Non-destructive testing of physical and mechanical properties of local zones in welded joints

Matyunin

Sliva

et al. 2022

J. Phys.: Conf. Ser.

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“…Wide beads can be achieved especially at high current, while high beads can be produced by a big amount of wire per unit length. Sliva et al [67], Gudenko et al [68], and Dragunov et al [69] pointed out the importance of beam oscillation parameters on the weld bead formation. By using concentric beam oscillations, the change of oscillation parameters (e.g., amplitude) together with beam current, the electron beam energy distribution and thus the distribution of energy input in the active zone can be adjusted.…”

Section: Dimension Of Single Beadsmentioning

confidence: 99%

Wire-Based Additive Manufacturing of Ti-6Al-4V Using Electron Beam Technique

et al. 2020

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Electron beam freeform fabrication is a wire feed direct energy deposition additive manufacturing process, where the vacuum condition ensures excellent shielding against the atmosphere and enables processing of highly reactive materials. In this work, this technique is applied for the α + β-titanium alloy Ti-6Al-4V to determine suitable process parameter for robust building. The correlation between dimensions and the dilution of single beads based on selected process parameters, leads to an overlapping distance in the range of 70–75% of the bead width, resulting in a multi-bead layer with a uniform height and with a linear build-up rate. Moreover, the stacking of layers with different numbers of tracks using an alternating symmetric welding sequence allows the manufacturing of simple structures like walls and blocks. Microscopy investigations reveal that the primary structure consists of epitaxial grown columnar prior β-grains, with some randomly scattered macro and micropores. The developed microstructure consists of a mixture of martensitic and finer α-lamellar structure with a moderate and uniform hardness of 334 HV, an ultimate tensile strength of 953 MPa and rather low fracture elongation of 4.5%. A subsequent stress relief heat treatment leads to a uniform hardness distribution and an extended fracture elongation of 9.5%, with a decrease of the ultimate strength to 881 MPa due to the fine α-lamellar structure produced during the heat treatment. Residual stresses measured by energy dispersive X-ray diffraction shows after deposition 200–450 MPa in tension in the longitudinal direction, while the stresses reach almost zero when the stress relief treatment is carried out.

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“…To obtain different seam widths, electron beam oscillations of various types and amplitudes were used. The minimum width of the seam was achieved through the application of a longitudinal sawtooth oscillation proposed in [17][18][19].…”

Section: Techniquementioning

confidence: 99%

Increase of Weld Joint Efficiency of the Combined Band of a High-Speed Rotor of an Electric Machine by Local Strengthening

Terentyev¹,

Marchenkov²,

Слива³

2020

SSP

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The research shows the possibility of increasing the structural strength of the weld joints of EP517 steel and 36NKhTYu iron-nickel alloy as applied to the combined bandage of the high-speed rotor of an electric machine, due to the effect of local strengthening of the soft interlayer. The technology of electron-beam welding of 36NKhTYu alloy to EP517 steel with free root formation, which allows to obtain narrow welds, is described. The results of metallographic researches and mechanical tests of weld joints with different weld widths are presented, which showed that the structure and properties of the weld metal on samples with different weld widths are almost identical. The tension test results of weld joints demonstrate a significantly greater ultimate tensile stress, compared to the ultimate tensile stress of the weld metal. Also, it was established that, due to the local strengthening phenomena the smaller the weld width, the stronger the welded joint is. In addition, the use of heat treatment after welding allows us to increase the strength properties of the weld metal and the heat-affected zone of the 36NKhTYu alloy, due to the formation of the hardening γ’-phase. The possibility of increasing the ultimate tensile strength of the weld up to 98% of the ultimate tensile stress value of EP517 steel (as the less durable of both welded materials), due to heat treatment and reducing the weld width, is demonstrated.

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EBW of aluminium alloys with application of electron beam oscillation

Cited by 7 publications

References 1 publication

Non-destructive testing of physical and mechanical properties of local zones in welded joints

Non-destructive testing of physical and mechanical properties of local zones in welded joints

Wire-Based Additive Manufacturing of Ti-6Al-4V Using Electron Beam Technique

Increase of Weld Joint Efficiency of the Combined Band of a High-Speed Rotor of an Electric Machine by Local Strengthening

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