The Paton Welding Journal, 2009, №01



2009 №01 (07)

2009 №01 (09)

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TPWJ, 2009, #1, 29-33 pages

INCREASE OF CYCLIC FATIGUE LIFE OF TEE WELDED JOINTS WITH SURFACE CRACKS

Journal                    The Paton Welding Journal
Publisher                 International Association «Welding»
ISSN                       0957-798X (print)
Issue                       № 1, 2009 (January)
Pages                      29-33
 
 
Authors
V.V. KNYSH, A.Z. KUZMENKO and A.S. SOLOVEJ
E.O. Paton Electric Welding Institute, NASU, Kiev, Ukraine
 
 
Abstract
Investigation results on the efficiency of using high-frequency mechanical peening to increase the fatigue resistance of tee welded joints on low-alloy steels containing fatigue cracks on their surface are presented. Two approaches to strengthening tee joints damaged by fatigue cracks are considered.
 
 
Keywords: welded structures, structural steels, tee welded joints, cyclic fatigue life, high-frequency mechanical peening, fatigue crack, strengthening technology
 
 
Received:                14.07.08
Published:               28.01.09
 
 
References
1. Trufyakov, V.I. (1998) Increase in fatigue resistance of welded joints and structures. Avtomatich. Svarka, 11, 11-19.
2. Paton, B.E. (2000) Modern trends in increase in strength and life of welded structures. The Paton Welding J., 9/10, 2-8.
3. Knysh, V.V., Kovalchuk, V.S. (2007) Extension of service life of metal structures from low-alloy steels by high-frequency mechanical peening after repair welding. Ibid., 11, 31-33.
4. Knysh, V.V., Kuzmenko, A.Z., Vojtenko, O.V. (2006) Increasing fatigue resistance of welded joints by high-frequency mechanical peening. Ibid., 1, 30-33.
5. Turnbull, A., De Los Rios, E.R., Tait, R.B. et al. (1998) Improving the fatigue crack resistance of waspalloy by shot peening. Fatigue & Fract. of Eng. Materials and Struct., 21, 1513-1524.
6. Branko, C.M., Infante, V., Bartista, R. (2004) Fatigue behaviour of the welded joints with cracks, repaired by hammer peening. Ibid., 27, 785-798.
7. Farrahi, G.H., Majzoobi, G.H., Hosseinzadeh, F. et al. (2006) Experimental evaluation of the effect of residual stress field on crack growth behaviour in C(T) specimen. Eng. Fract. Mechanics, 73, 1772-1782.
8. Song, P.S., Wen, C.C. (1999) Crack closure and growth behaviour in shot peened fatigue specimen. Ibid., 63, 295-304.
9. Xiaohua, C., Fisher, J.W., Prask, H.J. et al. (2003) Residual stress modification by post-weld treatment and its beneficial effect on fatigue strength of welded structures. Int. J. Fatigue, 25, 1259-1269.
10. Knysh, V.V., Valteris, I.I., Kuzmenko, A.Z. et al. (2008) Corrosion fatigue resistance of welded joints strengthened by high-frequency mechanical peening. The Paton Welding J., 4, 2-4.

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