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2000 №05 (12) 2000 №05 (02)

The Paton Welding Journal 2000 №05


The Paton Welding Journal, 2000, #5, 2-7 pages

Investigation of effect of phase transformations on residual stresses in circumferential welding of pipes

V.I. Makhnenko, E.A. Velikoivanenko, O.V. Makhnenko, G.F. Rozynka, N.I. Pivtorak

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

Abstract
The effect of microstructural changes, caused by welding thermal cycle, on residual stresses within the zone of a multipass circumferential butt weld in X65 steel pipe is investigated using numerical methods. Two versions of welding the pipe wall of 19mm thickness for 3 and 8 passes are considered. It is shown that allowance for microstructural changes in metal of weld and HAZ at different energy inputs of welding leads to the increase in non-uniformity of distribution of mechanical properties and residual stresses in weld zone.
Keywords: numerical investigation, microstructural changes, circumferential butt weld, multipass welding, heataffected zone, triaxial stressed state

References

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Suggested Citation

V.I. Makhnenko, E.A. Velikoivanenko, O.V. Makhnenko, G.F. Rozynka, N.I. Pivtorak (2000) Investigation of effect of phase transformations on residual stresses in circumferential welding of pipes. The Paton Welding J., 05, 2-7.