The Paton Welding Journal, 2007, №01

2007 №01 (03)

2007 №01 (05)

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The Paton Welding Journal, 2007, #1, 18-21 pages

Improvement of fracture resistance of joints of alloy 1420 produced by nonconsumable-electrode argon-arc welding with forced oscillations of the weld pool

T.M. Labur, A.G. Poklyatsky, A.A. Grinyuk

E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.

Abstract
Physico-chemical characteristics are compared of the Joints of high-strength aluminium alloy 1420 produced by nonconsumable electrode welding in argon by a regular stationary arc and by an arc deflected from the arc vertical axis due to current passing through the filler wire. Values of welded Joint strength and bending angle, as well as strength and impact toughness of weld metal, are determined, when batch-produced welding wire SvAMg63 is used. Values of fracture toughness were established, which determine the level of reliability of welded Joints in structure service. Features of microstructure of welds and their hardness distribution are analyzed.
Keywords: argon-arc welding, nonconsumable electrode, aluminuim alloys, welded joints, arc deflection, pool oscillations, physico-mechanical properties, hardness, structure, fracture resistance

References

1. Labur, T.M., Ishchenko, A.Ya., Kogut, N.S. (1990) Static crack resistance of welded joints of high-strength aluminium alloys. Avtomatich. Svarka, 4, 9–11.
2. Slavin, G.A. (1980) Formation of disoriented weld metal structure at low-frequency disturbance superposition on the weld pool. Svarochn. Proizvodstvo, 6, 3–5.
3. Zubrienko, G.L., Galkin, N.P., Gaponov, D.A. et al. (1972) Argon-arc welding of aluminium alloys with intermittent filler wire feed. Ibid., 4, 46–47.
4. Slavin, G.A., Trokhinskaya, N.M., Ryazantsev, V.I. et al. (1986) Optimising the parameters of manual and automatic welding of aluminium sheet alloys with superposition of short-time current pulses on the arc. Ibid., 1, 14–15.
5. Ishchenko, A.Ya., Poklyatsky, A.G., Lozovskaya, A.V. et al. (1990) Influence of the parameters of low-frequency modulation of alternating polarity rectangular current on weld structure in welding of aluminium alloys. Avtomatich. Svarka, 9, 23–27.
6. Ishchenko, A.Ya., Dovbishchenko, I.V., Budnik, V.P. et al. (1994) Current methods of arc welding of aluminium alloys. Ibid., 5/6, 35--37.
7. Maruo, H., Hirata, Yo., Makino, H. (1989) Rectangular wave AC TIG arc welding of aluminium alloy. Quarterly J. JWS, 1, 63–69.
8. Chernysh, V.P. (1964) Application of magnetic fields in electric arc welding. In: Problems of mechanics and machi¬ne-building. Kiev: KGU.
9. Bachelis, I.A. (1965) Magnetic control of welding arc. Svarochn. Proizvodstvo, 1, 17--19.
10. Bachelis, I.A., Varlamov, I.V. (1966) Displacement of electric arc in the magnetic field. Avtomatich. Svarka, 5, 45–48.
11. Mechev, V.S. (1968) Amplitude of electric arc oscillations in alternating magnetic field. Svarochn. Proizvodstvo, 3, 9–11.
12. Jayarajen, T.N., Jackson, C.E. (1972) Magnetic control of gas tungsten-arc welding process. Welding J., 51(8), 377–385.
13. Wendler, H.D. (1970) Die magnetische Beeinflussung des Schweisslichtbogen. Wiss. Z. Techn. Hoch. A, 14(7), 741–744.
14. Brodyagina, I.V. (1998) Arc welding of aluminium alloys with application of magnetic fields. Svarochn. Proizvodstvo, 9, 48–51.
15. Chernysh, V.P. (1968) Electromagnetic stirring of weld pool and deposited metal quality. Vestnik KPI. Series Mashinostroenie, 5, 61–67.
16. (1976) Fracture. Vol. 6: Fracture of metals. Ed. by G.T. Libovits. Moscow: Mir.
17. (1986) Static strength and fracture mechanics of steels. Ed. by V. Dal et al. Moscow: Metallurgiya.

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Suggested Citation

T.M. Labur, A.G. Poklyatsky, A.A. Grinyuk (2007) Improvement of fracture resistance of joints of alloy 1420 produced by nonconsumable-electrode argon-arc welding with forced oscillations of the weld pool. The Paton Welding J., 01, 18-21.

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