Obrabotka Metallov 2019 Vol. 21 No. 3

OBRABOTKAMETALLOV Vol. 21 No. 3 2019 94 MATERIAL SCIENCE References 1. Chumaevskii A.V., Kalashnikov K.N., Kalashnikova T.A., Ivanov A.N., Gusarova A.V. Formation of the surface gradient structures during adhesive friction of tribocoupling parts from dissimilar materials. AIP Conference Proceedings , 2018, vol. 2051. DOI: 10.1063/1.5083301. 2. Chumaevskii A.V., Gusarova A.V., Kalashnikov K.N., Kalashnikova T.A., Ivanov A.N. Influence of the con- figuration of the counterbody and the test temperature on the structure of the aluminum alloy AA2024 under the adhesion-diffusion friction. AIP Conference Proceedings , 2018, vol. 2051. DOI: 10.1063/1.5083298. 3. Kalashnikov K.N., Kalashnikova T.A., Chumaevskii A.V., Gusarova A.V., Ivanov A.N. Morphology of surface structures of aluminum alloy AA5056 samples subjected to dry friction by means of friction stir processing. AIP Conference Proceedings , 2018, vol. 2051, pp. 1–5. DOI: 10.1063/1.5083354. Ultrasonic Laser Welding of AA5083 Aluminum-Magnesium Alloy Andrey Vorontsov a, * , Alexander Eliseev b , Kseniya Osipovich c , Nikolai Savchenko d Institute of Strength Physics and Materials Science of the Siberian Branch of the RAS, 2/4 pr. Akademicheskii, Tomsk, 634055, Russian Federation a http://orcid.org/0000-0002-4334-7616, vav@ispms.ru , b https://orcid.org/0000-0001-5273-9729, alan@ispms.ru , c https://orcid.org/0000-0001-9534-775X , osipovich_k@ispms.tsc.ru , d http://orcid.org/0000-0001-8254-5853, savnick@ispms.ru Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2019 vol. 21 no. 3 pp. 83–96 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2019-21.3-83-96 Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov ARTICLE INFO Article history : Received: 17 June 2019 Revised: 02 July 2019 Accepted: 15 July 2019 Available online: 15 September 2019 Keywords : Laser welding Aluminum-magnesium alloy Weld seam structure Seam meta Funding This work was financially supported by Russian Federation Ministry of Education and Science (Agreement No 14.607.21.0190, project identifier RFMEFI60717X0190) ABSTRACT Introduction . Laser welding is one of the most effective methods of welded seams formation. High welding speed, ability to weld without the use of filler wire make laser welding one of the most promising welding methods. Another advantage over traditional arc welding is the ability to weld parts in a single pass without cutting edges. Laser welding continuously expands the range of applications, but still it is difficult to apply this type of welding to some materials. These materials include aluminum-magnesium alloys. Due to the various thermal properties of the aluminum matrix and magnesium, the main alloying element is burned out. Another problem in laser welding of Al-Mg alloys is high porosity. As a result, laser welded seams of Al-Mg alloys cannot be used in manufacture due to its low strength. The purpose of the work is to study the effect of ultrasonic influence on the formation structure of the welded seam of AA5083 alloy, obtained by laser welding. Results and discussions. Specimens of conventional laser welding and ultrasonic assisted laser welding are obtained. It is shown that under ultrasonic influence in the process of laser welding the shape of the weld changes. It is not possible to obtain a welded seam without pores, but it is shown that the number of gas pores decreases under ultrasonic influence. Quantitative estimation of energy investments on a volume fraction of the melted metal and value of penetration of laser radiation under the influence of ultrasound is carried out. It is also shown that the volume fraction of secondary particles in the weld metal decreases with an increase in the power of ultrasonic influence. Studies of microhardness welded seams showed a slight increase in microhardness values with ultrasonic influence in comparison with conventional laser welding. As a result of X-ray analysis it was found out that laser welding samples with ultrasonic influence with power 500 W have the nearest parameter of the lattice to the initial material. Also with the power of ultrasonic influence of 500 W the welded seams have the greater distortion of the crystal lattice among the examined ones. ______ * Corresponding author Vorontsov Andrey V. , Research assistant Institute of Strength Physics and Materials Science of the Siberian Branch of the RAS 2/4 pr. Akademicheskii, 634055, Tomsk, Russian Federation Tel.: +7 (983) 239-3417 , e-mail: vav@ispms.ru For citation: Vorontsov A.V., Eliseev A.A., Osipovich K.S., Savchenko N.L. Ultrasonic laser welding of AA5083 aluminum-magnesium alloy. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science , 2019, vol. 21, no. 3, pp. 83–96. DOI: 10.17212/1994-6309-2019-21.3-83-96. (In Russian).