The Paton Welding Journal, 2003, №08

2003 №08 (10)

2003 №08 (12)

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The Paton Welding Journal, 2003, #8, 49-50 pages

Effectiveness of fatigue crack retardation by the field of compressive residual stresses

V.A. Brodovoj, P.P. Mikheev, V.V. Knysh, O.I. Gushcha, A.Z. Kuzmenko, T.M. Labur

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

Abstract
Methods of fatigue crack retardation are studied, which are based on inducing compressive residual stresses in front of crack tips. Experiments were performed on specimens of aluminium alloy D16AT and steel St3sp (killed) with inducing residual stresses by a spot argon-arc surfacing and local heating. It is shown that inducing residual stresses in front of a crack at the level of just 0.3-0.5-s-y of those of the base metal increases the life of a sample by an order of magnitude or more.
Keywords: welded structures, residual stresses, fatigue cracks, crack retardation, cyclic fatigue life

References

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3. Brodovoj, V.A., Gushcha, O.I., Kuzmenko, A.Z. et al. (2001) Interaction of residual stresses in the zones of stress concentrators and fatigue cracks. The Paton Welding J., 9, 42-43.
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Suggested Citation

V.A. Brodovoj, P.P. Mikheev, V.V. Knysh, O.I. Gushcha, A.Z. Kuzmenko, T.M. Labur (2003) Effectiveness of fatigue crack retardation by the field of compressive residual stresses. The Paton Welding J., 08, 49-50 .

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