THERMAL SCIENCE

International Scientific Journal

INFLUENCE OF MATERIAL VELOCITY ON HEAT GENERATION DURING LINEAR WELDING STAGE OF FRICTION STIR WELDING

ABSTRACT
The heat generated during friction stir welding (FSW) process depends on plastic deformation of the material and friction between the tool and the material. In this work, heat generation is analysed with respect to the material velocity around the tool in Al alloy Al2024-T351 plate. The slip rate of the tool relative to the workpiece material is related to the frictional heat generated. The material velocity, on the other hand, is related to the heat generated by plastic deformation. During the welding process, the slippage is the most pronounced on the front part of the tool shoulder. Also, it is higher on the retreating side than on the advancing side. Slip rate in the zone around the tool pin has very low values, almost negligible. In this zone, the heat generation from friction is very low, because the material is in paste-like state and subjected to intensive plastic deformation. The material flow velocity around the pin is higher in the zone around the root of the pin. In the radial direction, this quantity increases from the pin to the periphery of the tool shoulder. [Projekat Ministarstva nauke Reublike Srbije, br. TR 35002 i br. IP 451-03-2802/2013-16/69]
KEYWORDS
PAPER SUBMITTED: 2015-09-04
PAPER REVISED: 2015-12-11
PAPER ACCEPTED: 2015-12-20
PUBLISHED ONLINE: 2016-01-01
DOI REFERENCE: https://doi.org/10.2298/TSCI150904217M
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2016, VOLUME 20, ISSUE 5, PAGES [1693 - 1701]
REFERENCES
  1. ***, Specification for Friction Stir Welding of Aluminum Alloys for Aerospace Hardware, American National Standard, AWS D17.3/D17.3M:2010, American Welding Society, Miami, USA, 2010
  2. Park, K., Development and Analysis of Ultrasonic Assisted Friction Stir Welding Process, Ph.D. thesis, University of Michigan, Ann Arbor, USA, 2009
  3. Veljić, D. et al., Numerical Simulation of the Plunge Stage in Friction Stir Welding, Structural Integrity and Life, 11 (2011), 2, pp. 131-134
  4. Veljić, D. et al., A Coupled Thermo-Mechanical Model of Friction Stir Welding, Thermal Science, 16 (2012), 2, pp. 527-534
  5. Veljić, D. et al., Heat Generation During Plunge Stage in Friction Stir Welding, Thermal Science, 17 (2013), 2, pp. 489-496
  6. Feulvarch, E. et al., A Simple and Robust Moving Mesh Technique for the Finite Element Simulation of Friction Stir Welding, Journal of Computational and Applied Mathematics, 246 (2013) pp. 269-277
  7. Song, M., Kovačević, R., Numerical and Experimental Study of the Heat Transfer Process in Friction Stir Welding, Journal of Engineering Manufacture, 217 (2003), 1, pp. 73-85
  8. Chen, C. M., Kovačević, R., Finite Element Modelling of Friction Stir Welding - Thermal and Thermomechanical Analysis, International Journal of Machine Tools & Manufacture, 43 (2003), 13, pp. 1319-1326
  9. Eramah, A. et al., Influence of Friction Stir Welding Parameters on Properties of 2024 T3 Aluminium Alloy Joints, Thermal Science, 17 (2013), Suppl. 1, pp. 21-27
  10. Mijajlović, M. et al., Experimental Studies of Parameters Affecting the Heat Generation in Friction Stir Welding Process, Thermal Science, 16 (2012), Suppl. 2, pp. 351-362
  11. Eramah, A. et al., Impact Fracture Response of Friction Stir Welded Al-Mg Alloy, Structural Integrity and Life, 13 (2013), 3, pp. 171-177
  12. Schmidt, H., Hattel, J., A Local Model for the Thermomechanical Conditions in Friction Stir Welding, Modelling & Simulation in Materials Science and Engineering,13 (2005), 1, pp. 77-93
  13. Zhang, Z. et al., Effect of Traverse/Rotational Speed on Material Deformations and Temperature Distributions in Friction Stir Welding, Journal of Materials Science & Technology, 24 (2008), 6, pp. 907-913
  14. Veljić, D. et al., Experimental and Numerical Thermo-Mechanical Analysis of Friction Stir Welding of High-Strength Aluminium Alloy, Thermal Science, 17 (2013), Suppl. 1, pp. 28-37
  15. Živojinović, D. et al., Crack Growth Analysis in Friction Stir Welded Joint Zones using Extended Finite Element Method, Structural Integrity and Life, 13 (2013), 3, pp. 179-188
  16. ***, Approved Certificate of Conformity No. 47831, ALCOA International, Inc., New York, USA
  17. ***, ASM International Aluminum 2024-T351 Data Sheet, asm.matweb.com/search/SpecificMaterial.asp?bassnum=MA2024T351
  18. Ivanović, I. et al., Numerical Study of Transient Three-dimensional Heat Conduction Problem with a Moving Heat Source, Thermal Science, 15 (2011), 1, pp. 257-266
  19. Berković, M. et al., Analysis of Welded Joints by Applying the Finite Element Method, Structural Integrity and Life, 4 (2004), 2, pp. 75-83
  20. Aburuga, T. et al., Numerical Aspects for Efficient Welding Computational Mechanics, Thermal Science, 18 (2014), s1, pp. 139-148
  21. Mladenović, V. et al., Numerical analysis of thermal stresses in welded joints made of steels X20 and X22. Thermal Science, 18 (2014), s1, pp. 121-126
  22. Rakin, M. et al., Modelling of ductile fracture initiation in strength mismatched welded joint, Engineering Fracture Mechanics, 75 (2008), 11, pp. 3499-3510
  23. ***, Abaqus Analysis Manual, Dassault Systemes, Paris, France, 2014
  24. Johnson, G. R., Cook, W. H., A Constitutive Model and Data for Metals Subjected to Large Strains, High Rates and High Temperatures, Proceedings of the 7th International Symposium on Ballistics. The Hague, The Netherlands, 1983, pp. 541-547
  25. Lesuer, D.R., Experimental Investigations of Material Models for Ti-6Al-4V Titanium and 2024-T3 Aluminium, Final Report, Department of Transportation, Washington DC, USA, 2000

© 2019 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, 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