Investigation of microstructure and mechanical properties of Al alloys lap joints by friction stir welding
Ajay TRIVEDI, Shaileshkumar N. PANDYA
Abstract. An experimental investigation on effect of friction stir lap welding (FSLW) process parameters on mechanical and microstructure of AA6082-O welds is presented. Three process parameters namely tool rotational speed (1000,1400 & 2000 rpm), tool shoulder diameter (18, 20 & 22 mm) and tool traverse speed (28, 56 & 80 mm/min) are considered. Experiments are planned as per L9 Taguchi array. Data are analyzed in terms of S/N ratio and Analysis of Variance (ANOVA). Tensile shear strength is observed in the range of 11.79 MPa to 29.23 MPa. It is observed that tool diameter and tool rotational speed are most significant factors affecting tensile shear strength. Optimum levels of process parameters (28 mm/min tool traverse speed, 18 mm tool diameter and 1400 rpm tool rotational speed) is decided based on analysis of experimental data. Using optimum process parameters for friction stir lap welding of Al alloys improved quality of welded joints can be made. Use of optimized parameters will improve the performance of the products in terms of durability and load carrying capacity.
Keywords
Friction Stir Welding, Tensile Shear Strength, Aluminum
Published online 3/1/2025, 10 pages
Copyright © 2025 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Ajay TRIVEDI, Shaileshkumar N. PANDYA, Investigation of microstructure and mechanical properties of Al alloys lap joints by friction stir welding, Materials Research Proceedings, Vol. 49, pp 519-528, 2025
DOI: https://doi.org/10.21741/9781644903438-52
The article was published as article 52 of the book Mechanical Engineering for Sustainable Development
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
References
[1] P. L. Threadgill, Terminology in friction stir welding. Sci. Technol. Weld. Join.,12(4) (2007) 357–360. https://doi.org/10.1179/174329307X197629
[2] C. B. Smith, J. F. Hinrichs, W. A. Crusan, J. Leverett, FSW Stirs up Welding Process Competition., 2 (2003) 25-31.
[3] W. M. Thomas, E. D. Nichola, Friction stir welding for the transportation industries. Mater. Des, 4(6) (2003) 269-273. https://doi.org/10.1016/S0261-3069(97)00062-9
[4] R. S. Mishra, M. W. Mahoney, Friction Stir Welding and Processing.1st edition, ASM International, Ohio, 2007,USA.
[5] K. Krishnaiah, P. Shahabudeen, Applied Design of Experiments and Taguchi Methods, 1st edition, PHI Learning Private Limited, Jaipur, 2012, INDIA.
[6] E. B. Howard, L. G. Timothy, Eds: Metals Handbook, Desk edition, American Society for Metals, Ohio, Metals Park, 1985, USA.
[7] P. A. Colegrove, H. R. Shercliff, Development of the TrivexTM friction stir welding tool for making lap welds. In: Fifth international symposium on friction stir welding, 14–16 September, (2004), Metz, France.
