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Abstract

In this investigation, high specific strength precipitation hardenable alloy AA7068-T6 was joined using friction stir welding. Experiments were carried out using the three factor-three level central composite face-centered design of response surface methodology. Regression models were developed to assess the influence of tool rotational speed, welding speed, and axial force on ultimate tensile strength and elongation of the fabricated joints. The validity of the developed models was tested using the analysis of variance (ANOVA), actual and adjusted values of the regression coefficients, and experimental trials. The analysis of the developed models together with microstructural studies of typical cases showed that the tool rotational speed and welding speed have a significant interaction effect on the tensile strength and elongation of the joints. However, the axial force has a relatively low interaction effect with tool rotational speed and welding speed on the strength and elongation of the joints. The process variables were optimized using the desirability function analysis. The optimized values of joint tensile strength and elongation – 516 MPa and 21.57%, respectively were obtained at a tool rotational speed of 1218 rpm, welding speed of 47 mm/ min, and an axial force of 5.3 kN.
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Bibliography

  1.  A.M. Khalil, I.S. Loginova, A.V. Pozdniakov, A.O. Mosleh, and A.N. Solonin, “Evaluation of the Microstructure and Mechanical Properties of a New Modified Cast and Laser-Melted AA7075 Alloy,” Materials, vol. 12, no. 20, 2019. [Online]. Available: https://www.mdpi. com/1996-1944/12/20/3430.
  2.  M. Minnicino, D. Gray, and P. Moy, “Aluminum alloy 7068 mechanical characterization,” Army Research Lab Aberdeen Proving Ground MD Weapons and Materials Research, Tech. Rep., 2009.
  3.  R.S. Mishra and Z. Ma, “Friction stir welding and processing,” Mater. Sci. Eng., R, vol. 50, no. 1‒2, pp. 1–78, 2005.
  4.  M. Mohammadi-pour, A. Khodabandeh, S. Mohammadipour, and M. Paidar, “Microstructure and mechanical properties of joints welded by friction-stir welding in aluminum alloy 7075-T6 plates for aerospace application,” Rare Met., pp. 1–9, 2016.
  5.  P. Goel, A.N. Siddiquee, N.Z. Khan, M.A. Hussain, Z.A. Khan, M.H. Abidi, and A. Al-Ahmari, “Investigation on the effect of tool pin profiles on mechanical and microstructural properties of friction stir butt and scarf welded aluminium alloy 6063,” Metals, vol. 8, no. 1, p. 74, 2018.
  6.  N. Martinez, N. Kumar, R. Mishra, and K. Doherty, “Effect of tool dimensions and parameters on the microstructure of friction stir welded aluminum 7449 alloy of various thicknesses,” Mater. Sci. Eng. A, vol. 684, pp. 470–479, 2017.
  7.  W. Xu, H. Wang, Y. Luo, W. Li, and M. Fu, “Mechanical behavior of 7085-T7452 aluminum alloy thick plate joint produced by double- sided friction stir welding: Effect of welding parameters and strain rates,” J. Manuf. Processes, vol. 35, pp. 261–270, 2018.
  8.  M. Mehta, A. Arora, A. De, and T. DebRoy, “Tool geometry for friction stir welding – optimum shoulder diameter,” Metall. Mater. Trans. A, vol. 42, no. 9, pp. 2716–2722, 2011.
  9.  M. Jayaraman, R. Sivasubramanian, V. Balasubramanian, and A. Lakshminarayanan, “Application of RSM and ANN to predict the tensile strength of Friction StirWelded A319 cast aluminium alloy,” Int. J. Manuf. Res., vol. 4, no. 3, pp. 306–323, 2009.
  10.  S. Jannet, P. Mathews, and R. Raja, “Comparative investigation of friction stir welding and fusion welding of 6061 T6-5083 O aluminum alloy based on mechanical properties and microstructure,” Bull. Pol. Acad. Sci. Tech. Sci., vol. 62, no. 4, 2014.
  11.  K. Deepandurai and R. Parameshwaran, “Multiresponse optimization of FSW parameters for cast AA7075/SiCp composite,” Mater. Manuf. Processes, vol. 31, no. 10, pp. 1333–1341, 2016.
  12.  M.M. Krishnan, J. Maniraj, R. Deepak, and K. Anganan, “Prediction of optimum welding parameters for FSW of aluminium alloys AA6063 and A319 using RSM and ANN,” Mater. Today: Proc., vol. 5, no. 1, pp. 716–723, 2018.
  13.  M. Vahdati, M. Moradi, and M. Shamsborhan, “Modeling and Optimization of the Yield Strength and Tensile Strength of Al7075 Butt Joint Produced by FSW and SFSW Using RSM and Desirability Function Method,” Trans. Indian Inst. Met., vol. 73, no. 10, pp. 2587–2600, 2020.
  14.  G. Derringer and R. Suich, “Simultaneous optimization of several response variables,” J. Qual. Technol., vol. 12, no. 4, pp. 214–219, 1980.
  15.  G. Kumar, R. Kumar, and R. Kumar, “Optimization of process parameters of friction stir welded AA5082- AA7075 butt joints using resonance fatigue properties,” Bull. Pol. Acad. Sci. Tech. Sci., vol. 68, no. 1, 2020, doi: 10.24425/bpasts.2020.131830.
  16.  A.R. Rose, K. Manisekar, and V. Balasubramanian, “Effect of axial force on microstructure and tensile properties of friction stir welded AZ61A magnesium alloy,” Trans. Nonferrous Met. Soc. China, vol. 21, no. 5, pp. 974–984, 2011.
  17.  K. Jata, K. Sankaran, and J. Ruschau, “Friction-stir welding effects on microstructure and fatigue of aluminum alloy 7050-T7451,” Metall. Mater. Trans. A, vol. 31, no. 9, pp. 2181–2192, 2000.
  18.  F. Viana, A. Pinto, H. Santos, and A. Lopes, “Retrogression and re-ageing of 7075 aluminium alloy: microstructural characterization,” J. Mater. Process. Technol., vol. 92, pp. 54–59, 1999.
  19.  D. Godard, P. Archambault, E. Aeby-Gautier, and G. Lapasset, “Precipitation sequences during quenching of the AA 7010 alloy,” Acta Mater., vol. 50, no. 9, pp. 2319– 2329, 2002.
  20.  A.P. Reynolds, W. Tang, Z. Khandkar, J.A. Khan, and K. Lindner, “Relationships between weld parameters, hardness distribution and temperature history in alloy 7050 friction stir welds,” Sci. Technol. Weld. Joining, vol. 10, no. 2, pp. 190–199, 2005.
  21.  V.S. Gadakh and K. Adepu, “Heat generation model for taper cylindrical pin profile in fsw,” J. Mater. Res. Technol., vol. 2, no. 4, pp. 370–375, 2013.
  22.  K.K. Ramachandran, N. Murugan, and S.S. Kumar, “Performance analysis of dissimilar friction stir welded aluminium alloy AA5052 and HSLA steel butt joints using response surface method,” Int. J. Adv. Manuf. Technol, vol. 86, no. 9, pp. 2373–2392, 2016.
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Authors and Affiliations

M.D. Bindu
1
P.S. Tide
1
A.B. Bhasi
1
K.K. Ramachandran
2

  1. Division of Mechanical Engineering, Cochin University of Science and Technology, Kerala, India
  2. Department of Mechanical Engineering, Government Engineering College, Trissur, Kerala, India

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