Effect of Tool Shoulder and Pin Cone Angles in Friction Stir Welding using Non-circular Tool Pin

Document Type : Research Paper


1 Department of Mechanical Engineering, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai, India

2 Department of Mechanical Engineering, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Chennai, Tamil Nadu, India


In friction stir welding frictional heat is generated by the rotating tool, sliding over the stationary plate along the weld centre. Tool being the only source of heat producing member, its geometrical design influences the heat generation rate. In this present work, effects of variation in tool shoulder and tool pin taper angles on thermal history during joining are analysed. Tools with triangular and hexagonal tool pins are used to understand the influence of tool pin shape on process temperature. An analytical heat input model is developed for tools with non-circular tool pins and a comparative study is carried out between the hexagonal and triangular tool pins on temperature distribution using a three dimensional Matlab model. Proposed model is validated through experimental analysis. Apart from this, regression model based comparative study is carried out on the variation in temperature response to the change in tool pin shape, tool shoulder and tool pin taper angle.


Main Subjects

[1] Langari, J., Kolahan, F., Aliakbari, K., Effect of tool speed on axial force, mechanical properties and weld morphology of friction stir welded joints of a7075-t651, International Journal of Engineering, 29, 2016, 403–410.
[2] Mehta, K.P., Badheka, V.J., Effects of tilt angle on properties of dissimilar friction stir welding copper to aluminium, Materials and Manufacturing Processes, 31, 2016, 255–263.
[3] Chien, C.H., Lin, W.B., Chen, T., Optimal FSW process parameters for aluminum alloys AA5083, Journal of the Chinese Institute of Engineers, 34, 2011, 99–105.
[4] Colligan, K.J., Pickens, J.R., Friction stir welding of aluminium using a tapered shoulder tool, Proceedings of the Conference: Friction stir Welding and Processing III, 161-170, San Francisco, CA, 2005.
[5] Gratecap, F., Girard, M., Marya, S., Racineux, G., Exploring material flow in friction stir welding : tool eccentricity and formation of banded structures, International Journal of Material Forming, 5(2), 2012, 99-107.
[6] Zhang, Y.N., Cao, X., Larose, S., Wanjara, P., Review of tools for friction stir welding and processing, Science and Technology of Welding and Joining, 51(3), 2012, 250 – 60.
[7] Mijajlovic, M., Milcic, D., Andjelkovic, B., Vukicevil, M., Bjelic, M., Mathematical Model for Analytical Estimation of Generated Heat During Friction Stir Welding. Part 1, Journal of the Balkan Tribological Association, 17(2), 2011, 179-191.
[8] Durdanovic, M.B., Mijajlovic, M.M., Milcic, D.S., Stamenkovic, D.S., Heat Generation During Friction Stir Welding Process, Tribology in industry, 31, 2009, 1-8.
[9] Kumar, R.R., Kumar, A., Kumar, S., Effect on Tool Design and Heat Input of Some Welding Parameters in Friction Stir Welded Interstitial Free Steels, International Journal of Engineering and Technology Innovation, 8(1), 2018, 64 - 75.
[10] Periyasamy, Y.K., Perumal, A.V., Periyasamy, B.K., Influence of Tool Shoulder Concave Angle and Pin Profile on Mechanical Properties and Microstructural Behaviour of Friction Stir Welded AA7075-T651 and AA6061 Dissimilar Joint, Transactions of the Indian Institute of Metals, 72, 2019, 1087-1109.
[11] Mugada, K.K., Adepu, K., Role of Tool Shoulder End Features on Friction Stir Weld Characteristics of 6082 Aluminum Alloy, Journal of The Institution of Engineers (India): Series C, 100(2), 2019, 343–350.
[12] Liu, X.C., Sun, Y.F., Nagira, T., Ushioda, K., Fujii, H., Experimental evaluation of strain and strain rate during rapid cooling friction stir welding of pure copper, Journal of Science and Technology of Welding and Joining, 24(4), 2019, 352-359.
[13] Hattingh, D.G., Blignaul, C., Niekerk, van T.I., James, M.N., Characterization of the influences of FSW tool geometry on welding forces and weld tensile strength using an instrumented tool, Journal of Materials Processing Technology, 203, 2008, 46–57.
[14] Buffa, G., Hua, J., Shivpuri, R., Fratini, L., Design of the friction stir welding tool using the continuum based FEM model, Materials Science and Engineering A, 419, 2006, 381–388.
[15] Waheed, M.A., Jaiyesimi, L.O., Ismail, S.O., Dairo, O.U., Analytical investigation of the effects of tool pin profile and process parameters on the peak temperature in friction stir welding, Journal of Applied and Computational Mechanics, 3(2), 2017, 114-124.
[16] Su, H., Wu, C.S., Bachmann, M., Rethmeier, M., Numerical modeling for the effect of pin profiles on thermal and material flow characteristics in friction stir welding, Materials & Design, 77, 2015, 114-125.
[17] Waheed, M.A., Jayesimi, L.O., Ismail, S.O., Dairo, O.U., Modeling of Heat Generations for Different Tool Profiles in Friction Stir Welding: Study of Tool Geometry and Contact Conditions, Journal of Applied and Computational Mechanics, 3(1), 2017, 37-59.
[18] Gadakh, V.S., Kumar, A., Friction stir welding window for AA6061-T6 aluminium alloy. Proceedings of the Institution of Mechanical Engineers, Part B, Journal of Engineering Manufacture, 228(9), 2014, 1172–1181.
[19] Hamilton, C., Dymek, S., Sommers, A., A thermal model of friction stir welding in aluminium alloys, International Journal of Machine tools and Manufacture, 48(10), 2008, 1120–1130.
[20] Stephen Leon, J., Jayakumar, V., Numerical modelling of thermal field during friction stir welding using non-circular pin, Caribbean Journal of Science, 53(1), 2019, 21-28.
[21] Liu, X.C., Sun, Y.F., Morisada, Y., Fujii, H., Dynamics of rotational flow in friction stir welding of aluminium alloys, Journal of Materials Processing Technology, 252, 2018, 643-651.
[22] Ramanjaneulu, K., Madhusudhan Reddy, G., Venugopal Rao, A., Markandeya, R., Structure-property correlation of AA2014 Friction sir welds: Roles of Tool pin profile, Journal of Materials Engineering and Performance, 22(8), 2013, 2224-2240.
[23] Illangovan, M., Rajendra Boopathy, S., Balasubramanian, V., Effect of tool pin profile on microstructure and tensile properties of friction stir welded dissimilar AA6061-AA5086 aluminium joints, Defence Technology, 11, 2015, 174-184.