Журналы →  Tsvetnye Metally →  2023 →  №10 →  Назад

MATERIALS SCIENCE
Название Properties of one-sided friction stir welded joints of 1901T1 alloy plates
DOI 10.17580/tsm.2023.10.10
Автор Drits A. M., Ovchinnikov V. V., Reztsov R. B., Shumeyko R. M.
Информация об авторе

Samara Metallurgical Plant JSC, Moscow, Russia

A. M. Drits, Director for Business and Technology Development, Candidate of Technical Science, e-mail: dritsam@gmail.com

 

Moscow Polytechnic University, Moscow, Russia
V. V. Ovchinnikov, Professor, Head of the Department of Materials Science, Doctor of Technical Science, e-mail: vikov1956@mail.ru
R. B. Reztsov, Postgraduate Student at the Department of Materials Science, e-mail: anikron_91@mail.ru
R. M. Shumeyko, Master’s Student at the Department of Materials Science, e-mail: reginasumejko@gmail.com

Реферат

This paper describes the results of a study that looked at the mechanical and corrosion properties of joints made in 10 mm thick plates of aluminium alloy 1901T1 by one-sided friction stir welding (FSW) in air and underwater. It is shown that a higher rate of cooling of the stir zone and the heat-affected zone leads to an approximate 1.5–2% increase in the tensile strength of the joint and metal in the stir zone (seam) compared with FSW in air. The strength factor of the joints is 0.85 to 0.86. The average size of grains in the stir zone of the underwater welded 1901T1 alloy plates is 5.33 μm, whereas in the case of FSW in air the average size of grains in the seam is 9.12 μm. During tensile tests, the fracture of the weld joint formed in 1901Т1 alloy by FSW in air and underwater starts in the zone of thermo-mechanical impact and develops through the heat-affected zone. In the case of FSW underwater, the length of the heat-affected zone is approximately 1.7 to 2.5 times less than that observed in the case of FSW in air. The hardness of the stir zone after FSW in air is similar to that of the base metal, whereas under FSW underwater it exceeds that value. Additional ageing, i.e. after FSW, at the temperature of 170 oC for 2 hours leads to decreased hardness of all zones of the joint produced by FSW in air and underwater. Both after welding in air and underwater and additional ageing at 170 oC for 2 hours, the fracture of the metal in the stir zone obtained as the result of tensile testing is distinctly ductile, with typical pits at the surface. The intercrystalline corrosion of the base metal is 85 μm. During FSW in air, both the heat-affected zone (90 μm) and the stir zone (the seam metal) (96 μm) are equally prone to intercrystalline corrosion. At the same time, during FSW underwater the depth of intercrystalline corrosion is reduced to 27 μm in the seam metal and to 35 μm in the heat-affected zone.
This research was carried out under Project No. 22-19-00121: Regularities of Structural and Phase Transformations in Aluminium-Calcium Alloys Doped with Zinc and Magnesium; the funding was provided under a grant by the Russian Science Foundation.

Ключевые слова aluminium alloy, Al – Zn – Mg system, 1901T1 alloy, plate, onesided friction stir welding, mechanical properties, grain size, hardness, intercrystalline corrosion, fracture
Библиографический список

1. Drits A. M., Ovchinnikov V. V. Welding of aluminium alloys (Monograph). 2nd revised edition. Moscow : “Ore and Metals” Publishing House, 2020. 476 p.
2. Artsruni A. A., Kupryunin D. G. Aluminium armour for military equipment. Moscow : Izdatelstvo “Radio Soft”, 2017. 255 p.
3. Weglowski M. S. Friction stir processing — State of the art. Archives of Civil and Mechanical Engineering. 2018. Vol. 18, Iss. 1. pp. 114–129.
4. Xie G. M., Ma Z. Y., Geng L. Development of a fine-grained microstructure and the properties of a nugget zone in friction stir welded pure copper. Scripta Materialia. 2007. Vol. 57, Iss. 2. pp. 73–76.
5. Patel V. V., Badheka V., Kumar A. Influence of Friction Stir Processed Parameters on Superplasticity of Al – Zn – Mg – Cu Alloy. Materials and Manufacturing Processes. 2016. Vol. 31, Iss. 12. pp. 1573–1582.
6. Bakshaev V. A., Drits A. M., Ovchinnikov V. V., Grigoriev M. V. Method of friction welding with mixing of joints of aluminium alloys. Patent RF, No. 2686494. Applied: 12.10.2018. Published: 29.04.2019. Bulletin No. 13.
7. Srinivasa Rao T., Koteswara Rao S. R., Madhusudhan Reddy G. The microstructure of aluminium alloy AA7075-T651 cooled down in the process of friction stir welding and how it tends to fracture. Metallovedenie i termicheskaya obrabotka metallov. 2019. No. 6 (768). pp. 48–55.
8. Gupta A. K., Puram M. M. Fabrication of the composites (AA6082-T6/SiC) by using friction stir processing. Lecture Notes in Mechanical Engineering. 2021. pp. 435–440.
9. Kalashnikov K. N., Tarasov S. Y., Chumaevskii A. V., Fortuna S. V. et al. Towards aging in a multipass friction stir–processed АА2024. International Journal of Advanced Manufacturing Technology. 2019. Vol. 103, Iss. 5-8. pp. 2121–2132.
10. Pereira P. H. R., Huang Y., Kawasaki M., Langdon T. G. Achieving superplasticity in fine-grained Al – Mg – Sc alloys. Materials Science Forum. 2021. Vol. 1016. pp. 11–17.
11. Lukin V. I., Betsofen S. Ya., Panteleev M. D., Dolgova M. I. The heat deformation cycle of FSW and its effect on the structure of a V-1469 alloy weld joint. Svarochnoe Proizvodstvo. 2017. No. 7. pp. 17–24.
12. Kumar K. S. A., Yogesha K. B. Experimental investigations to find the effect of post weld heat treatment (PWHT) on the microstructure and mechanical properties of FSW dissimilar joints of AA2024-T351 and AA7075-T651. Materials Today: Proceedings. 2021. Vol. 49. pp. 243–249.
13. Nelson T. W., Steel R. J., Arbegast W. J. In situ thermal studies and postweld mechanical properties of friction stir welds in age hardenable aluminium alloys. Science and Technology of Welding and Joining. 2003. Vol. 8, Iss. 4. pp. 283–288.
14. Su J. Q., Nelson T. W., Sterling K. J. A new route to bulk nanocrystalline materials. Journal of Material Research. 2003. Vol. 18, Iss. 8. pp. 1757–1760.
15. Drits A. M., Ovchinnikov V. V., Solovieva I. V., Bakshaev V. A. Properties and structure of joints of alloy 1151 of the Al – Cu – Mg system, obtained by friction stir welding with forced cooling of the seam. Tsvetnye Metally. 2020. No. 11. pp. 70–76.
16. Drits A. M., Ovchinnikov V. V., Solovieva I. V., Bakshaev V. A. The effect of forced cooling during friction stir welding on the structure and properties of 1565ChN116 aluminium alloy joints. Tsvetnye Metally. 2021. No. 8. pp. 50–57.
17. Zhang H. J., Liu H. J., Yu L. Microstructure and mechanical properties as a function of rotation speed in underwater friction stir welded aluminium alloys joints. Material and Design. 2011. Vol. 32. pp. 4402–4407.
18. Sharma C., Dwivedi D. K., Kumar P. Influence of in-process cooling on tensile behavior of stir friction welded joints. Material and Design. 2011. Vol. 32. pp. 4402–4407.
19. Papahn H., Bahemmat P., Haghpanahi M. Study on governing parameters of thermal history during underwater friction stir welding. The International Journal of Advanced Manufacturing Technology. 2015. Vol. 78. pp. 101–1111.
20. GOST 4784–2019. Aluminium and wrought aluminium alloys. Grades. Introduced: 01.09.2019.
21. GOST 6996–66. Welded joints. Methods of mechanical properties determination. Introduced: 01.01.1967.
22. GOST R ISO 6705–1–2007. Metals and alloys. Vickers hardness test. Part 1. Test method. Introduced: 01.08.2008.
23. GOST 9.021–74. Unified system of corrosion and ageing protection. Aluminium and aluminium alloys. Accelerated test methods for intercrystalline corrosion. Introduced: 01.01.1975.
24. Humphreys F. J. Quantitative metallography by electron backscattered diffraction. Journal of Microscopy. 1999. Vol. 195, Iss. 3. pp. 170–185.

Language of full-text русский
Полный текст статьи Получить
Назад