DOI: https://doi.org/10.20535/2521-1943.2017.81.117489

Effectiveness of ultrasonic peening in fatigue improvement of welded elements and structures

Jacob Kleiman, Yuri Kudryavtsev, Oleksandr Luhovskyi

Abstract


Abstract. The ultrasonic impact treatment (UIT) is relatively new and promising process for fatigue life improvement of welded elements and structures. In most industrial applications this process is known as ultrasonic peening (UP). The beneficial effect of UP is achieved mainly by relieving of tensile residual stresses and introducing of compressive residual stresses into surface layers of a material. The secondary factors in fatigue improvement by UP are decreasing of stress concentration in weld toe zones and enhancement of mechanical properties of the surface layers of the material. Fatigue testing of welded specimens showed that UP is the most efficient improvement treatment as compared with traditional techniques such as grinding, TIG-dressing, heat treatment, hammer peening and application of LTT electrodes. The developed computerized complex for UP was successfully applied for increasing the fatigue life and corrosion resistance of welded elements, elimination of distortions caused by welding and other technological processes, residual stress relieving, increasing of the hardness of the surface of materials. The UP could be effectively applied for fatigue life improvement during manufacturing, rehabilitation and repair of welded elements and structures. The areas/industries where the UP process was applied successfully include: Shipbuilding, Railway and Highway Bridges, Construction Equipment, Mining, Automotive, Aerospace. The results of fatigue testing of welded elements in as-welded condition and after application of UP are considered in this paper. It is shown that UP is the most effective and economic technique for increasing of fatigue strength of welded elements in materials of different strength. These results also show a strong tendency of increasing of fatigue strength of welded elements after application of UP with the increase in mechanical properties of the material used.

Keywords


residual stresses; ultrasonic peening method; underwater ultrasonic peening; UltraPeen®; fatigue life

Full Text:

PDF

References


Trufyakov, V., Mikheev, P. and Kudryavtsev, Y. (1995), “Fatigue Strength of Welded Structures. Residual Stresses and Improvement Treatments”, Harwood Academic Publishers GmbH. London, p. 100.

Kudryavtsev, Y., Korshun, V. and Kuzmenko, A. (1989), Improvement of Fatigue Life of Welded Joints by Ultrasonic Impact Treatment. Paton Welding Journal, No. 7, pp. 24-28.

Trufyakov, V., Mikheev, P., Kudryavtsev, Y. and Reznik, D. (1993), “Ultrasonic Impact Peening Treatment of Welds and Its Effect on Fatigue Resistance in Air and Seawater”, Proceedings of the Offshore Technology Conference, OTC 7280 pp. 183-193.

Kudryavtsev, Y., Mikheev, P. and Korshun, V. (1995), “Influence of Plastic Deformation and Residual Stresses Created by Ultrasonic Impact Treatment on Fatigue Strength of Welded Joints”, Paton Welding Journal, No. 12. pp. 3-7.

Trufiakov, V., Mikheev, P., Kudryavtsev, Y. and Statnikov, E. (1995), “Ultrasonic Impact Treatment of Welded Joints”, International Institute of Welding, IIW Document XIII-1609-95.

Kudryavtsev, Y. and Kleiman, J. (2009), “Fatigue Improvement of Welded Elements and Structures by Ultrasonic Impact Treatment (UIT/UP)”, International Institute of Welding, IIW Document XIII-2276-09.

Kudryavtsev, Y. and Kleiman, J. (2010), “Increasing Fatigue Strength of Welded Elements and Structures by Ultrasonic Impact Treatment”, International Institute of Welding, IIW Document XIII-2318-10.

Patent of USA # 6467321. (2002), “Device for Ultrasonic Peening of Metals.

Kudryavtsev, Y., Kleiman, J., Lobanov, L. and dr. (2004), Fatigue Life Improvement of Welded Elements by Ultrasonic Peening”, International Institute of Welding, IIW Document XIII-2010-04, 20 p.

Kudryavtsev, Y., Kleiman, J., Lugovskoy, A. and dr. (2005), “Rehabilitation and Repair of Welded Elements and Structures by Ultrasonic Peening”, International Institute of Welding, IIW Document XIII-2076-05, 13 p.

Kudryavtsev, Y., Kleiman, J., Lugovskoy, A. and dr. (2006), “Fatigue Life Improvement of Tubular Welded Joints by Ultrasonic Peening”, International Institute of Welding, IIW Document XIII-2117-06, 24 p.

Kudryavtsev, Y., Kleiman, J. and Iwamura, Y. (2009), “Fatigue Improvement of HSS Welded Elements by Ultrasonic Peening”, Proceedings of the International Conference on High Strength Steels for Hydropower Plants, July 20-22, Takasaki, Japan.

Haagensen, P. (2005), “Progress Report on IIW WG2 Round Robin Fatigue Testing Program on 700 MPa and 350 MPa YS Steels”, International Institute of Welding, IIW Document XIII-2081-05.

Marquis, G. and Björk, T. (2008), “Variable Amplitude Fatigue Strength of Improved HSS Welds”, International Institute of Welding, IIW Document XIII-2224-08.

Kudryavtsev, Y. (2008), “Residual Stress”, Springer Handbook on Experimental Solid Mechanics, Springer – SEM., pp. 371-387.

Reo D. Grey and James R. Denison (1944), Scaling Tool, USA, Patent No. 2,356,314.

Joseph F. Niedzwiecki (1967), Descaling Tool, USA, Patent No. 3,349,461.

Krilov, N.A., Polishchuk, A.M. (1970), Using of ultrasonic apparatus for metal structure stabilization. Physical background of industrial using of ultrasound, LDNTP, Part 1, Leningrad, Russian.

Robert C., McMaster and Charles C. Libby (1971), Metal Working Apparatus and Process, USA, Patent No. 3,609,851.

Charles C. Libby and William J. White (1971), Intermediary Impact Device, USA, Patent No. 3,595,325.

Feng, C. and Graff, K. (1972), Impact of a Spherical Tool against a Sonic Transmission Line, The Journal of the Acoustical Society of America, Vol. 52, No. 1, Part 2, pp. 254-259.

Polozky, I. Nedoseka, A. Prokopenko, G. and dr. (1974), Relieving of welding residual stresses by ultrasonic treatment, The Paton Welding Journal, no. 5, pp. 74-75.

Statnikov, E., Zhuravlev, L., Alexeyev, A., Bobylev, Yu., Shevtsov, E., Sokolenko, V. and Kulikov, V. (1975), Ultrasonic head for strain hardening and relaxation treatment, Russian, Author’s Certificate (USSR), no. 472782.

Prokopenko, G. and Krivko, V. (1978), Ultrasonic multiple-strikers device, Russian, Author’s Certificate (USSR), no. 601143.

Langenecker, B. (1966), “Effects of Ultrasound on Deformation Characteristics of Metals”, IEEE Transactions on Sonics and Ultrasonics, Vol. SU-13, No. 1, March, pp. 1-8.

Kudryavtsev, Yuri, Kleiman, Jacob and Lugovskoy, Alexander (2013), “Underwater Ultrasonic Peening of Welede Elements and Structures”, Proceedings of the 4th International Conference on INTEGRITY, RELIABILITY and FAILURE (IRF2013), Funchal, Portugal, 23-27 June.

Tao, N.R., Wang, Z.B., Tong, W.P. and dr. (2002), “An investigation of surface nanocrystallization mechanism in Fe induced by surface mechanical attrition treatment”, Acta Materialia, no. 50, pp. 4603–4616.


GOST Style Citations