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Название Properties of aluminium casting alloy joints produced by friction stir welding
DOI 10.17580/tsm.2020.01.11
Автор Drits A. M., Ovchinnikov V. V.
Информация об авторе

Arconik SMZ JSC, Moscow, Russia:

A. M. Drits, Director for Business and New Technology Development, Candidate of Technical Sciences, e-mail: Alexander.Drits@arconic.com


Moscow Polytechnic University, Moscow, Russia:
V. V. Ovchinnikov, Professor at the Department of Metal Science, Doctor of Technical Sciences, e-mail: vikov1956@mail.ru


The report presents the results of mechanical tests of welded joints of cast aluminum alloys: AM4,5Kd, AM5, VAL16 produced by manual multi-pass argon-arc welding with additive wire Sv1201 and SvAMg63 and by double pass friction stir welding. During friction stir welding (FSW) tool rotation causes heating and plasticizing of metal. Moving the tool along the seam leads to metal transfer to the area released behind the tool. As a result, stirring of welded metal occurs with the formation of welded joint. The processes of intense plastic deformation affect the formation of the microstructure of the welded joint, on which its strength properties depend, and the time — temperature parameters at which the friction stir welding process is realized are a determining factor. The study of the structure of the core of welded seam found the special layered structure of metal, which consists of recrystallized grains separated by high-angle boundaries. Independence of this structure from the initial state of welding billets demonstrates the self-organization of micro-structure of core zone for which formation temperature and plastic deformation are determining factors. It is found that during FSW of cast aluminum alloys fully recrystallized structure with the same medium-sized grains (3.9–5.3 mkm) is formed in the core of welded seam. The level of mechanical properties of welded joints made by friction stir welding (FSW) for these alloys significantly exceeds the level of mechanical properties of joints produced by multi-pass argon-arc welding. The strength coefficient of welded joints of alloys AM4.5Kd, AM5 and VAL16, made by friction stir welding, is 79.2, 81.3 and 96.7%, respectively.

Ключевые слова Cast aluminum alloys, friction stir welding, welded joint, mechanical properties, microstructure, grain size, hardness
Библиографический список

1. Ryazantsev V. I., Ovchinnikov V. V., Glotov E. B., Kaynov V. M. Welding of aluminium casting alloys. Zagotovitelnye proizvodstva v mashinostroenii. 2008. No. 8. pp. 17–25.
2. Ovchinnikov V. V. Advanced knowledge intensive welding technologies. Naukoemkie tekhnologii. 2011. No. 5. pp. 35–45.
3. Ovchinnikov V. V., Manakov I. N., Kurbatova I. A. Weldability of casting alloy VAL14 with wrought alloys 1151 and М40. Zagotovitelnye proizvodstva v mashinostroenii. 2015. No. 11. pp. 7–12.
4. Nikitina E. V., Frolov V. A. Cast and welded structures made of aluminium alloys: Peculiar aspects of production. Svarochnoe Proizvodstvo. 2006. No. 11. pp. 3–8.
5. Ryazantsev V. I., Glotov E. B., Kaynov V. M. Welding of aluminium casting alloys. Aviatsionnaya promyshlennost. 2008. No. 1. pp. 36–41.
6. Bezborodov V. P., Belyuk S. I., Durakov V. G., Dampilon B. V., Semukhin B. S. Effect of electron-beam welding on the structure and properties of aluminium casting alloys. Svarochnoe Proizvodstvo. 2002. No. 10. pp. 13–15.
7. Bratukhin A. G., Postnikov N. S. Innovative production of composite structures and the properties of aluminium cast deformed welded joints. Vestnik mashinostroeniya. 1992. No. 8-9. pp. 35–42.
8. Bratukhin A. G., Glotov E. B., Lukin V. I., Postnikov N. S. Production of cast deformed structures: The concept and metallurgical aspects. Svarochnoe Proizvodstvo. 1993. No. 10. pp. 2–4.
9. Lyushinskiy A. V., Baranov A. A. Friction stir welding: Some equipment and process features. Svarochnoe Proizvodstvo. 2016. No. 10. pp. 51–54.
10. Liu H., Hu Y., Peng Ya., Chao Dou, Wang Z. The effect of interface defect on mechanical properties and its formation mechanism in friction stir lap welded joints of aluminum alloys. Journal of Materials Processing Technology. 2016. Vol. 238. pp. 244–254.
11. Chen Y., Ding H., Cai Z., Zhao J., Li J. Effect of initial base metal temper on microstructure and mechanical properties of friction stir processed of Al – 7B04 alloy. Materials Science and Engineering: A. 2016. Vol. 650. pp. 396–399.

12. Frolov V. A., Konkevich V. Yu., Predko P. Yu., Belotserkovets V. V. Friction stir welding of heat-treatable Al – Zn – Mg – Cu alloy V95. Svarochnoe Proizvodstvo. 2013. No. 3. pp. 21–26.
13. Ovchinnikov V. V. Friction stir welding of aluminium and magnesium alloys: A review of process features. Mashinostroenie i inzhenernoe obrazovanie. 2016. No. 4. pp. 22–45.
14. GOST 1583–93. Aluminium casting alloys. Specifications. Introduced: 01.01.1997.
15. TU 1-92-159–90. Stampings and forgings made of carbon and structural alloy steel. Specifications. Introduced: 01.06.1990.
16. Zolotarevskiy V. S., Belov N. A. Aluminium casting alloys and metal science. Moscow : MISiS, 2005. 376 p.
17. GOST 6996–66. Welded joints. Methods of mechanical properties determination (incl. Revisions No. 1, 2, 3, 4). Introduced: 01.01.1967.
18. GOST R ISO 4136–2009. Destructive tests on welds in metallic materials. Transverse tensile test. Introduced: 01.01.2011.
19. McNelley T. R., Swamtnathan S., Su J. Q. Recrystallization mechanisms during friction stir welding processing of aluminum alloys. Scripta Materialia. 2008. No. 58. pp. 349–354.
20. Kolubaev A. V., Tarasov S. Yu., Sizova O. V., Kolubaev E. A., Ivanov Yu. F. Structural evolution of the surface layer in metals under sliding friction. Trenie i iznos. 2007. Vol. 28, No. 6. pp. 582–590.
21. Huang Y., Wang T., Guo W., Wan L., Lv Sh. Microstructure and surface mechanical property of AZ31 Mg/SiCp surface composite fabri cated by Direct Friction Stir Processing. Materials and Design. 2014. No. 59. pp. 274–278.
22. Kolubaev A. V., Kolubaev E. A., Sizova O. V., Zaikina A. A., Rubtsov V. E. et al. On the Similarity of Microstructure Generation in Friction Stir Welding and Sliding Test. Journal of Friction and Wear. 2015. Vol. 36(2). pp. 127–131.
23. Drits A. M., Ovchinnikov V. V., Mikhaylovskaya A. V., Kishchik M. S. Effect of the grain size in ‘1565chM’ alloy sheets on the structure and properties of FSW joints. Tekhnologiya legkikh splavov. 2016. No. 3. pp. 36–43.

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