In this work, lap-joined titanium alloy sheets have been successfully spot welded using friction stir spot welding (FSSW). Fully consolidated spot welds of thin Ti6Al4V sheets were obtained with a convex scrolled polycrystalline cubic boron nitride probe. The influence of processing parameters on FSSW was evaluated through a finite element analysis (FEA). Numerical results showed that von Mises stress and strain distributions were non-symmetric in the stir zone, whereas higher temperatures were observed in the region next to the tool pin. The welding microstructures showed different effects due to temperature gradients and material flow. The tool configuration played a significant role when determining the spot weld quality, since it directly influences the flow behavior of FSSW. It was observed that, in the stir zone, the microstructure suffered a transformation from α to β. The effect of welding parameters and the development of a FEA for the friction stir spot process were explored in the current investigation.
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C. Cui, B.M. Hu, L. Zhao, and S. Liu, Titanium Alloy Production Technology, Market Prospects and Industry Development, Mater. Des., 2011, https://doi.org/10.1016/j.matdes.2010.09.011
X. Zhan, Y. Liu, J. Liu, Y. Meng, Y. Wei, J. Yang, and X. Liu, Comparative Study on Experimental and Numerical Investigations of Laser Beam and Electron Beam Welded Joints for Ti6Al4V Alloy, J. Laser Appl., 2017, https://doi.org/10.2351/1.4975824
C. Qi, X. Zhan, Q. Gao, L. Liu, Y. Song, and Y. Li, The Influence of the Pre-placed Powder Layers on the Morphology, Microscopic Characteristics and Microhardness of Ti-6Al-4V/WC MMC Coatings during Laser Cladding, Opt. Laser Technol., 2019, https://doi.org/10.1016/j.optlastec.2019.105572
X. Zhan, H. Bu, Q. Gao, T. Yan, and W. Ling, Temperature Field Simulation and Grain Morphology on Laser Welding-Brazing Between Ti-6Al-4V and 1050 Aluminum Alloy, Mater. Res. Express., 2019, https://doi.org/10.1088/2053-1591/ab061a
P. Chai, W. Hu, S. Ji, X. Ai, Z. Lv, and Q. Song, Refill Friction Stir Spot Welding Dissimilar Al/Mg Alloys, J. Mater. Eng. Perform., 2019, 28, p 6174–6181. https://doi.org/10.1007/s11665-019-04359-7
D. Trimble, G.E. O’Donnell, and J. Monaghan, Characterisation of Tool Shape and Rotational Speed for Increased Speed during Friction Stir Welding of AA2024-T3, J. Manuf. Process., 2015, https://doi.org/10.1016/j.jmapro.2014.08.007
A. Toumpis, A. Galloway, S. Cater, and N. McPherson, Development of a Process Envelope for Friction Stir Welding of DH36 Steel—A Step Change, Mater. Des., 2014, https://doi.org/10.1016/j.matdes.2014.04.066
Y. Zhang, Y.S. Sato, H. Kokawa, S.H.C. Park, and S. Hirano, Microstructural Characteristics and Mechanical Properties of Ti-6Al-4V Friction Stir Welds, Mater. Sci. Eng., A, 2008, https://doi.org/10.1016/j.msea.2007.08.051
H. Papahn, P. Bahemmat, M. Haghpanahi, and I.P. Aminaie, Effect of Friction Stir Welding Tool on Temperature, Applied Forces and Weld Quality, IET Sci. Meas. Technol., 2015, https://doi.org/10.1049/iet-smt.2014.0150
H. Fujii, Y. Sun, H. Kato, and K. Nakata, Investigation of Welding Parameter Dependent Microstructure and Mechanical Properties in Friction Stir Welded Pure Ti Joints, Mater. Sci. Eng., A, 2010, https://doi.org/10.1016/j.msea.2010.02.023
S. Mironov, Y. Zhang, Y.S. Sato, and H. Kokawa, Development of Grain Structure in β-Phase Field during Friction Stir Welding of Ti-6Al-4V Alloy, Scr. Mater., 2008, https://doi.org/10.1016/j.scriptamat.2008.02.014
K. Kitamura, H. Fujii, Y. Iwata, Y.S. Sun, and Y. Morisada, Flexible Control of the Microstructure and Mechanical Properties of Friction Stir Welded Ti-6Al-4V Joints, Mater. Des., 2013, https://doi.org/10.1016/j.matdes.2012.10.051
W.S. Lee and C.F. Lin, High-Temperature Deformation Behaviour of Ti6A14V Alloy Evaluated by High Strain-Rate Compression Tests, J. Mater. Process. Technol., 1998, https://doi.org/10.1016/S0924-0136(97)00302-6
H.J. Liu, L. Zhou, and Q.W. Liu, Microstructural Characteristics and Mechanical Properties of Friction Stir Welded Joints of Ti-6Al-4V Titanium Alloy, Mater. Des., 2010, https://doi.org/10.1016/j.matdes.2009.08.025
L. Zhou, H.J. Liu, and Q.W. Liu, Effect of Rotation Speed on Microstructure and Mechanical Properties of Ti-6Al-4V Friction Stir Welded Joints, Mater. Des., 2010, https://doi.org/10.1016/j.matdes.2009.12.014
J. Wang, J. Su, R.S. Mishra, R. Xu, and J.A. Baumann, Tool Wear Mechanisms in Friction Stir Welding of Ti-6Al-4V Alloy, Wear, 2014, https://doi.org/10.1016/j.wear.2014.09.010
S. Yoon, R. Ueji, and H. Fujii, Effect of Rotation Rate on Microstructure and Texture Evolution during Friction Stir Welding of Ti-6Al-4V Plates, Mater. Charact., 2015, https://doi.org/10.1016/j.matchar.2015.06.025
H. Jamshidi Aval, Microstructure and Residual Stress Distributions in Friction Stir Welding of Dissimilar Aluminium Alloys, Mater. Des., 2015, https://doi.org/10.1016/j.matdes.2015.08.050
X.W. Yang, T. Fu, and W.Y. Li, Friction Stir Spot Welding: A Review on Joint Macro- and Microstructure, Property, and Process Modelling, Adv. Mater. Sci. Eng., 2014, https://doi.org/10.1155/2014/697170
X. Song, L. Ke, L. Xing, F. Liu, and C. Huang, Effect of Plunge Speeds on Hook Geometries and Mechanical Properties in Friction Stir Spot Welding of A6061-T6 Sheets, Int. J. Adv. Manuf. Technol., 2014, https://doi.org/10.1007/s00170-014-5632-y
Y. Bozkurt, S. Salman, and G. Çam, Effect of Welding Parameters on Lap Shear Tensile Properties of Dissimilar Friction Stir Spot Welded aa 5754-h22/2024-t3 Joints, Sci. Technol. Weld. Join., 2013, https://doi.org/10.1179/1362171813Y.0000000111
F.A. Garcia-Castillo, F.J. García-Vázquez, F.A. Reyes-Valdés, P.C. Zambrano-Robledo, G.M. Hernández-Muñoz, and E.R. Rodríguez-Ramos, Microstructural Evolution in Ti-6Al-4V Alloy Joints Using the Process of Friction Stir Spot Welding, Weld. Int., 2018, 32, p 570–578. https://doi.org/10.1080/09507116.2017.1347346
D. Kim, H. Badarinarayan, I. Ryu, J.H. Kim, C. Kim, K. Okamoto, R.H. Wagoner, and K. Chung, Numerical Simulation of Friction Stir Spot Welding Process for Aluminum Alloys, Met. Mater. Int., 2010, https://doi.org/10.1007/s12540-010-0425-9
P. Fanelli, F. Vivio, and V. Vullo, Experimental and Numerical Characterization of Friction Stir Spot Welded Joints, Eng. Fract. Mech., 2012, https://doi.org/10.1016/j.engfracmech.2011.07.009
S. Mandal, J. Rice, and A.A. Elmustafa, Experimental and Numerical Investigation of the Plunge Stage in Friction Stir Welding, J. Mater. Process. Technol., 2008, 203, p 411–419. https://doi.org/10.1016/j.jmatprotec.2007.10.067
M. Awang, V.H. Mucino, Z. Feng, S.A. David, Thermo-mechanical Modeling of Friction Stir Spot Welding (FSSW) Process: Use of an Explicit Adaptive Meshing Scheme, in: SAE Tech. Pap. (2005). https://doi.org/10.4271/2005-01-1251.
G. D’Urso and C. Giardini, FEM Model for the Thermo-mechanical Characterization of Friction Stir Spot Welded Joints, Int. J. Mater. Form., 2016, https://doi.org/10.1007/s12289-015-1218-y
Z. Zhang and H.W. Zhang, Numerical Studies on Controlling of Process Parameters in Friction Stir Welding, J. Mater. Process. Technol., 2009, https://doi.org/10.1016/j.jmatprotec.2008.01.044
G. Buffa, L. Fratini, M. Schneider, and M. Merklein, Micro and Macro Mechanical Characterization of Friction Stir Welded Ti-6Al-4V Lap Joints through Experiments and Numerical Simulation, J. Mater. Process. Technol., 2013, https://doi.org/10.1016/j.jmatprotec.2013.07.003
J.J. Swab, L. Vargas-Gonzalez, E. Wilson, and E. Warner, Properties and Performance of Polycrystalline Cubic Boron Nitride, Int. J. Appl. Ceram. Technol., 2015, 12, p E74–E81. https://doi.org/10.1111/ijac.12380
A.L. Pilchak and J.C. Williams, Microstructure and Texture Evolution during Friction Stir Processing of Fully Lamellar Ti-6Al-4V, Metall. Mater. Trans. A Phys. Metall. Mater. Sci., 2011, https://doi.org/10.1007/s11661-010-0434-9
K.H. Muci-Küchler, S. Kalagara, and W.J. Arbegast, Simulation of a Refill Friction Stir Spot Welding Process Using a Fully Coupled Thermo-mechanical FEM Model, J. Manuf. Sci. Eng. Trans. ASME, 2010, https://doi.org/10.1115/1.4000881
Z. Xu, Z. Li, Z. Lv, and L. Zhang, Effect of Tool Rotating Speed on Microstructure and Mechanical Properties of Friction Stir Lap Welded Ti–6Al–4V Alloy, Int. J. Adv. Manuf. Technol., 2017, 90, p 3793–3800. https://doi.org/10.1007/s00170-016-9741-7
S. Mironov, Y. Zhang, Y.S. Sato, and H. Kokawa, Crystallography of Transformed β Microstructure in Friction Stir Welded Ti-6Al-4V Alloy, Scr. Mater., 2008, https://doi.org/10.1016/j.scriptamat.2008.04.038
J.W. Elmer, T.A. Palmer, S.S. Babu, W. Zhang, and T. DebRoy, Phase Transformation Dynamics during Welding of Ti-6Al-4V, J. Appl. Phys., 2004, https://doi.org/10.1063/1.1737476
A.J. Ramirez and M.C. Juhas, Microstructural Evolution in Ti-6Al-4V Friction Stir Welds, Mater. Sci. Forum, 2003, https://doi.org/10.4028/www.scientific.net/msf.426-432.2999
T.G. Nieh and J. Wadsworth, Hall–Petch Relation in Nanocrystalline Solids, Scr. Metall. Mater., 1991, https://doi.org/10.1016/0956-716X(91)90256-Z
The authors would like to acknowledge the funding provided by both the PROMEP program and the Aeronautical Research Center of FIME UANL.
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García-Castillo, F.A., Reyes, L.A., Garza, C. et al. Investigation of Microstructure, Mechanical Properties, and Numerical Modeling of Ti6Al4V Joints Produced by Friction Stir Spot Welding. J. of Materi Eng and Perform (2020). https://doi.org/10.1007/s11665-020-04900-z
- finite element method
- friction stir spot welding