Process Parameter Optimization of Aerospace-Grade Dissimilar Aluminium Alloy 7075 and 2014 by Friction Stir Welding

Abstract:

In friction stir welding process, the selection of optimum process parameter is an important step. To make a welding with high quality in all aspects such as defect free and reduced HAZ region, it becomes necessary to choose the parameter in such a way the temperature developed due to heat generation is in optimum level. A study on the effect of process parameters on temperature distribution and HAZ region is performed for dissimilar combination of AA7075 and AA2014. A statistical model based on Box-Behnken RSM is built to study the interaction effect of parameters on temperature distribution and optimization of process parameter is obtained as is Tool Rotational Speed (TRS) – 1400 rpm, Tool Traverse Speed (TTS) – 1.21mm/s and Tool Size Ratio (TSR) – 4. An experiment of FSW is made with K-type thermocouples for optimized parameter of AA7075+AA2014 and temperature reading is then compared with simulation for validation of model. The prediction accuracy is in the range of maximum 98.69% and minimum 92.45%. It was observed that optimum depth location of thermocouples is beyond the half of thickness because of less error attained as 1.31%.

• Periodical: Key Engineering Materials (Volume 961)
• Pages: 3-13
• DOI: https://doi.org/10.4028/p-usC1pR
• Online since: October 2023
• Authors: Kannan Sekar*, Pandian Vasanthakumar
• Keywords: AA2014, AA7075, Dissimilar Aluminium Alloys, Friction Stir Welding, RSM

References

[1] W. M. U. Thomas, E. D. Nicholas, A. Hall, and C. Cb, "Friction stir Welding for the transportation industries," Materials & Design, vol. 18, 1998, p.269–273.

DOI: 10.1016/s0261-3069(97)00062-9

[2] P. Rao, J. Akram, and M. Misra, "Low temperature frictions stir welding of P91 steel," Defence Technology, vol. 17, 2015, pp.115-118.

[3] J. Fathi, P. Ebrahimzadeh, R. Ferasati, and R. Teimouri, "Friction stir welding of aluminum 6061-T6 in presence of watercooling: Analyzing mechanical properties and residual stress distribution," Int. J. Light. Mater. Manuf., 2019, pp.251-255.

DOI: 10.1016/j.ijlmm.2019.04.007

[4] S. A. Khodir and T. Shibayanagi, "Friction stir welding of dissimilar AA2024 and AA7075 aluminum alloys," Materials Science and Engineering B, vol. 148, 2008, p.82–87.

DOI: 10.1016/j.mseb.2007.09.024

[5] K. Sekar and P. Vasanthakumar, "Microstructural evaluation of similar and dissimilar welding of aluminum metal matrix hybrid composite by friction stir welding," Mater. Sci. Forum, vol. 979 MSF, p.124–128, 2020.

DOI: 10.4028/www.scientific.net/msf.979.124

[6] Sekar. K, Vasanthakumar. P Friction Stir Welding of Al-Cu Alloy Metal Matrix Composites Reinforced with B4C and Graphite Particle Fabricated by Stir Casting and Thixoforming Method, M. S. Shunmugam and M. Kanthababu, "Advances in Additive Manufacturing and Joining," in Editors Proceedings of AIMTDR, 2018.

DOI: 10.1007/978-981-32-9433-2_44

[7] V. Pandian and S. Kannan. "Effect of high entropy particle on aerospace-grade aluminium composite developed through combined mechanical supersonic vibration and squeeze infiltration technique". J. Manuf. Process, vol. 74, p.383–399, 2022.

DOI: 10.1016/j.jmapro.2021.12.024

[8] V. Pandian and S. Kannan. "Processing and preparation of aerospace-grade aluminium hybrid metal matrix composite in a modified stir casting furnace integrated with mechanical supersonic vibration squeeze infiltration method". Mater. Today Commun., vol. 26, p.101732, 2021.

DOI: 10.1016/j.mtcomm.2020.101732

[9] K. Sekar and P. Vasanthakumar, "Microstructural and Mechanical Properties of Dissimilar Aluminium Alloys by Friction Stir Welding". Key Engineering Materials, vol. 934 KEM, pp.129-138, 2022.

DOI: 10.4028/p-9oujj7

[10] K. Sekar and P. Vasanthakumar, "Mechanical and tribological properties of Al6063 hybrid composites reinforced with SiC/ZrO2 by stir casting and thixoforming process," Mater. Sci. Forum, vol. 979 MSF, p.47–51, 2020.

DOI: 10.4028/www.scientific.net/msf.979.47

[11] G. Orhan, G. Hapçi, and Ö. Keleş, "Application of response surface methodology (RSM) to evaluate the influence of deposition parameters on the electrolytic Cu-Zn alloy powder," Int. J. Electrochem. Sci., vol. 6, no. 9, 2011, p.3966–3981.

DOI: 10.1016/s1452-3981(23)18303-9

[12] B. Rajeswari and K. S. Amirthagadeswaran, "Experimental investigation of machinability characteristics and multi-response optimization of end milling in aluminium composites using RSM based grey relational analysis," Measurement, vol. 105,2017, p.78–86.

DOI: 10.1016/j.measurement.2017.04.014

[13] K. Sekar, "Mechanical and tribological properties of Al7475-SiCp composites by stir casting method and wear rate modeling using RSM," Sādhanā, vol. 44, no. 5, 2019, p.129.

DOI: 10.1007/s12046-019-1105-1

[14] K. Sekar and P. Vasanthakumar, "Mechanical properties of Al-Cu alloy metal matrix composite reinforced with B4C, Graphite and Wear Rate Modeling by Taguchi Method," Mater. Today Proc., vol. 18, p.3150–3159, 2019.

DOI: 10.1016/j.matpr.2019.07.190

[15] V. Pandian and S. Kannan, "Numerical prediction and experimental investigation of aerospace-grade dissimilar aluminium alloy by friction stir welding," J. Manuf. Process., vol. 54, no. February, p.99–108, 2020.

DOI: 10.1016/j.jmapro.2020.03.001

[16] P.Vasanthakumar, K. Sekar, and J. Jayantherababu, "Thermal prediction and experimental validation of Friction Stir Welded Aerospace Grade Aluminium Alloy," J. Phys. Conf. Ser., vol. 1240, no. 1, 2019.

DOI: 10.1088/1742-6596/1240/1/012150

[17] S. R. Nathan, V. Balasubramanian, S. Malarvizhi, and A. G. Rao, "Effect of welding processes on mechanical and microstructural characteristics of high strength low alloy naval grade steel joints," Def. Technol., vol. 11, no. 3,2015, p.308–317.

DOI: 10.1016/j.dt.2015.06.001

[18] S. Chand et al., "Effect of FSW welding speed on microstructure and microhardness of Al-0.84Mg-0.69Si-0.76Fe alloy at moderate rotational tool velocity," IOP Conf. Ser. Mater. Sci. Eng., vol. 330, no. 1,2018, p.0–12.

DOI: 10.1088/1757-899x/330/1/012022

[19] J. C. Hou, H.J. Liu, and Y.Q. Zhao, "Influences of rotation speed on microstructures and mechanical properties of 6061-T6 aluminum alloy joints fabricated by self-reacting friction stir welding tool," Int. J. Adv. Manuf. Technol., vol. 73, no. 5–8,2014, p.1073–1079.

DOI: 10.1007/s00170-014-5857-9

[20] N.Z. Khan, Z.A. Khan, and A. N. Siddiquee, "Effect of Shoulder Diameter to Pin Diameter (D/d) Ratio on Tensile Strength of Friction Stir Welded 6063 Aluminium Alloy," Mater. Today Proc., vol. 2, no. 4–5,2015, p.1450–1457.

DOI: 10.1016/j.matpr.2015.07.068

[21] M. Almeida, R. Erthal, E. Padua, L. Silveira, and L. Am, "Talanta Response surface methodology ( RSM ) as a tool for optimization in analytical chemistry," vol. 76,2008, p.965–977.

DOI: 10.1016/j.talanta.2008.05.019

[22] M. Grujicic, J. S. Snipes, S. Ramaswami, R. Galgalikar, and C. Yen, "Computational analysis of the intermetallic formation during the dissimilar metal aluminum-to-steel friction stir welding process," vol. 10, 2017, p.1–21.

DOI: 10.1177/1464420716673670