THERMAL SCIENCE

International Scientific Journal

TEMPERATURE BASED VALIDATION OF THE ANALYTICAL MODEL FOR THE ESTIMATION OF THE AMOUNT OF HEAT GENERATED DURING FRICTION STIR WELDING

ABSTRACT
Friction stir welding is a solid-state welding technique that utilizes thermomechanical influence of the rotating welding tool on parent material resulting in a monolith joint - weld. On the contact of welding tool and parent material, significant stirring and deformation of parent material appears, and during this process, mechanical energy is partially transformed into heat. Generated heat affects the temperature of the welding tool and parent material, thus the proposed analytical model for the estimation of the amount of generated heat can be verified by temperature: analytically determined heat is used for numerical estimation of the temperature of parent material and this temperature is compared to the experimentally determined temperature. Numerical solution is estimated using the finite difference method - explicit scheme with adaptive grid, considering influence of temperature on material's conductivity, contact conditions between welding tool and parent material, material flow around welding tool, etc. The analytical model shows that 60-100% of mechanical power given to the welding tool is transformed into heat, while the comparison of results shows the maximal relative difference between the analytical and experimental temperature of about 10%.
KEYWORDS
PAPER SUBMITTED: 2012-02-09
PAPER REVISED: 2012-04-02
PAPER ACCEPTED: 2012-04-18
DOI REFERENCE: https://doi.org/10.2298/TSCI120209173M
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2012, VOLUME 16, ISSUE Supplement 2, PAGES [S337 - S350]
REFERENCES
  1. Soundararajan, V., Valant, M., Kovacevic, R., An Overview of R&D Work in Friction Stir Welding at SMU, MJoM, Metalurgija - Journal of Metallurgy, Association of Metallurgical Engineers of Serbia, 204 (2006), 12, pp. 277-295,
  2. Djurdjanović, M., et al., Heat Generation During Friction Stir Welding Process, Tribology in Industry, 31 (2009), 1-2, pp. 8-14.
  3. Mijajlović, M., et al., Mathematical Model for Analytical Estimation of Generated Heat During Friction Stir Welding. Part 1, Journal of Balkan Tribological Association, 17 (2011), 2, pp. 179-191.
  4. Ulysse, P., Three-Dimensional Modeling of the Friction Stir-Welding Process, Int. J. Mach. Tool. Manu., 42 (2002), pp.1549-1557. Milčić, D., S.et. al.: Temperature Based Validation of the Analytical Model for … THERMAL SCIENCE, Year 2012, Vol. 16, Suppl. 2, pp. S389-S403 S403
  5. Schmidt, H., Hattel, J., Wert, J., An Analytical Model for the Heat Generation in Friction Stir Welding, Modeling Simul. Mater. Sci. Eng. 12 (2004), 1, pp. 143-157.
  6. Mijajlović, M. et al., Mathematical Model for Analytical Estimation of Generated Heat During Friction Stir Welding. Part 2, Journal of Balkan Tribological Association, 17 (2011), 3, pp. 361-370.
  7. Galin, L. A., Contact Problems; The legacy of L.A. Galin, Series: Solid Mechanics and Its Applications (in Russian), Nauka, Moscow, Russia, 15 (2008).
  8. Kumar, K. et al., An Investigation of Friction during Friction Stir Welding of Metallic Materials, Materials and Manufacturing Processes, 24 (2009), 4, pp. 438-445.
  9. Mijajlović, M. et al., Study About Friction Coefficient Estimation in Friction Stir Welding, Balkantrib 11, The 7th International Conference on Tribology, Proceedings, Thessaloniki, Greece, 2011, pp. 323- 330.
  10. Mijajlović, M., Investigation and Development of Analytical Model for Estimation of Amount of Heat Generated During FSW (in Serbian), Ph. D. thesis, Faculty of Mechanical Engineering Nis, University of Nis, Nis, Serbia, 2012.
  11. Živković, A., Influence of Friction Stir Welding Tool Geometry on Properties of Welded Joint of Alloys Al 2024 T351 (in Serbian), Ph. D. thesis, Faculty of Mechanical Engineering, University of Belgrade, Belgrade, Serbia, 2011.
  12. Ilić, G., Radojković, N, Stojanović, I., Thermodynamics II - Basics of heat distribution (in Serbian), Vranje, Yugoslavia, 1996.

© 2022 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence