2023 №07 (06) DOI of Article
2023 №07 (01)

The Paton Welding Journal 2023 #07
The Paton Welding Journal, 2023, #7, 47-52 pages

Nondestructive evaluation of residual stresses in welded joints on the base of a combination of ultrasonic testing and speckle-interferometry

L.M. Lobanov1, V.V. Knysh1, M.O. Pashchin1, V.G. Kot1, O.L. Mikhodui1, Ye.D. Pekar1, Luyi Huang2, A.O. Alyoshyn3

1E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail:
2Zhejiang Special Equipment Research Institute. 211 Kaixuan Road, Hangzhou, China. E-mail:
3Foreign Economy Representation of the E.O. Paton Chinese-Ukrainian Institute of Welding», Ltd. 11 Kazymyr Malevych str., 03150, Kyiv, Ukraine. Е-mail:

It was found that a combination of the advantages of ultrasonic testing and electron speckle-interferometry in the case of elimination of their disadvantages is the base for development of the method of nondestructive evaluation of residual welding stresses in full-scale structures. A procedure of nondestructive evaluation of the distribution of residual tensile welding stresses in the weld zone of a butt welded joint was developed. It is based on simultaneous application of ultrasonic testing and electron speckle-interferometry and fulfillment of the condition of «area equality» of the epures of balanced compressive and tensile residual stresses. The procedure was proposed for application on samples of single-pass welded joints of sheet constructions from metallic materials with a stable structure. The subject of the study are tensile residual welding stresses in a MIG-welded sample of a butt joint of structurally stable 1561 aluminium alloy. Residual welding stress component σх longitudinal relative to the weld was evaluated in the plate central area. It was found that the discrepancy of the values of residual welding stresses near the center of the welded joint of 1561 aluminium alloy is equal to approximately 0.1σ0,2 for this material, which corresponds to the claimed accuracy of the methods. Based on the investigation results, a range of procedures was proposed for nondestructive evaluation of the residual welding stresses in full-scale welded structures, based on a combination of ultrasonic testing and electron speckle-interferometry. 9 Ref., 2 Tabl., 6 Fig.
Keywords: residual welding stresses, ultrasonic testing (UT), electronic speckle-interferometry (ЕSPІ), butt joint sample, MIG welding, compressive and tensile testing, longitudinal component of stresses, aluminium alloy, procedure of nondestructive evaluation of stresses

Received: 24.03.2023
Accepted: 06.09.2023


1. Guz, A.N. (1986) Elastic waves in bodies with initial stresses. Vol. 2: Regularities of propagation. Kyiv, Naukova Dumka [in Russian].
2. Kasatkin, B.S. et al. (1981) Experimental methods of stresses and strains examination. Kyiv, Nukova Dumka [in Russian].
3. Lutsenko, T.M. (2022) New systems and technologies of non-destructive testing for industry of Ukraine under current conditions. In: Abstr. of Papers of Sci. Conf. on Welding and Technical Diagnostics for Economic Revival of Ukraine. IAW, 66 [in Ukrainian].
4. Kudryavtsev, Y., Kleiman, J., Gushcha, O. (2000) Ultrasonic measurement of residual stresses in welded railway bridge. Structural Materials Technology. NDT Conf. (Atlantic City, NJ, February 28–March 3, 2000), 213–218.
5. Kudryavtsev, Y., Kleiman, J., Polezhaeva, H. (2011) Ultrasonic measurement of residual stresses in welded elements of ship structure. Applied Mechanics and Materials, Vol. 70, 273-278.
6. Javadi, Y., Akhlaghi M., Najafabadi M. (2013) Using finite element and ultrasonic method to evaluate welding longitudinal residual stress through the thickness in austenitic stainless steel plates. J. Mater. Des., Vol. 45, 628-642.
7. Guz, A.N., Makhort, F.G., Gushcha, O.J. (1977) Introduction into acousto- elasticity. Kyiv, Naukova Dumka [in Russian].
8. Lobanov, L.M., Pivtorak, V.A., Savitsky, V.V., Tkachuk, G.I. (2006) Procedure for determination of residual stresses in welded joints and structural elements using electron speckle-interferometry. The Paton Welding J., 1, 24-29.
9. Gushcha, O.J. (1995), Makhort, F.G. (1995) Application of acoustic method for determination of residual stresses in welded structures. Tekh. Diagnost. ta Nerazrush. Kontrol, 4, 8?15 [in Russian]