Comparison and Analysis of the Effect of Tools with Pins of Different Cross-Sections in the Friction-Stir Welding Method

محورهای موضوعی : Manufacturing process monitoring and control

Aala Hadi Bejai Almayali ¹ , Ahmad Afsari ² , Seyed Mohammad Reza Nazemosadat ³ , Mohammad Marzban ⁴

1 - Department of Mechanical Engineering, Shiraz Branch, Islamic Azad University, Shiraz, Iran
2 - Department of Mechanical Engineering, Shiraz Branch, Islamic Azad University, Shiraz, Iran
3 - Department of Mechanical Engineering, Shiraz Branch, Islamic Azad University, Shiraz, Iran
4 - Department of Mechanical Engineering, Shiraz Branch, Islamic Azad University, Shiraz, Iran

تاریخ دریافت : 1403/09/28 تاریخ پذیرش : 1403/12/01 تاریخ انتشار : 1404/02/19

کلید واژه: Friction Stir Welding, Aluminum Alloy, Tool Geometry, Microstructure, Mechanical Properties,

چکیده مقاله :

Friction Stir Welding (FSW) is a solid-state welding method that serves as a suitable alternative to fusion welding for materials such as aluminum, copper, magnesium, and even steel alloys. In this research, samples of Al 5754 H22 and Al 6063 T4 were welded using FSW. The tools employed in this study featured cylindrical and conical pins, both with and without threads. The tool material was H13 hot-worked steel, hardened to 52 ± 2 Rockwell C. The FSW process was performed using a vertical milling machine. The results indicate that the shape of the pin significantly affects the weld structure and its mechanical properties. The pin's geometry greatly influences the flow of plastic materials, as different pin designs employ various material transfer techniques. Consequently, modifying the geometry of the tool pin can enhance the process for joining dissimilar materials. The highest welding quality was achieved with the tool featuring a threaded conical pin, which resulted in a visually appealing weld with no obvious defects. The microstructure of the weld was fine, and the distribution of sediment was uniform with small sizes. The hardness tests revealed that changes in tool geometry did not significantly affect the hardness levels. However, the threaded conical tool provided the highest tensile strength for the weld, with the tensile strength of the weld joint reaching up to 75% of that of the base metal.

چکیده انگلیسی:

Friction Stir Welding (FSW) is a solid-state welding method that serves as a suitable alternative to fusion welding for materials such as aluminum, copper, magnesium, and even steel alloys. In this research, samples of Al 5754 H22 and Al 6063 T4 were welded using FSW. The tools employed in this study featured cylindrical and conical pins, both with and without threads. The tool material was H13 hot-worked steel, hardened to 52 ± 2 Rockwell C. The FSW process was performed using a vertical milling machine. The results indicate that the shape of the pin significantly affects the weld structure and its mechanical properties. The pin's geometry greatly influences the flow of plastic materials, as different pin designs employ various material transfer techniques. Consequently, modifying the geometry of the tool pin can enhance the process for joining dissimilar materials. The highest welding quality was achieved with the tool featuring a threaded conical pin, which resulted in a visually appealing weld with no obvious defects. The microstructure of the weld was fine, and the distribution of sediment was uniform with small sizes. The hardness tests revealed that changes in tool geometry did not significantly affect the hardness levels. However, the threaded conical tool provided the highest tensile strength for the weld, with the tensile strength of the weld joint reaching up to 75% of that of the base metal.

منابع و مأخذ:

[1] Mishra, R.S. and Ma, D.Z. 2005. Friction stir welding and processing. Materials science and engineering. 50(1-2):1-78. doi:10.1016/j.mser.2005.07.001.
[2] Nilesh K., Wei Y. and Rajiv S. M. 2015. Friction stir welding of dissimilar alloys and materials. Elsevier Inc. All rights reserved. Imprint: Butterworth-Heinemann. doi:10.1016/C2014-0-01707-8.
[3] Mardalizadeh, M., Soleymani Yazdi, M.R. and Safarkhanian, M. 2013. Experimental evaluation of the tool rotation speed and feed rate on micro hardness and microstructure of 5456 aluminum alloy in friction stir welding process. Journal of Solid and Fluid Mechanics. 3(3):1-10. doi:10.22044/jsfm.2013.200.
[4] Khalafe, W.H., Sheng, E.L., Bin Isa, M.R., Omran, A.B. and Shamsudin, S.B. 2022. The effect of friction stir welding parameters on the weldability of aluminum alloys with similar and dissimilar metals. 12(12):2099. doi:10.3390/met12122099.
[5] Zhang, J., Shen, Y., Li, B., Xu, H., Yao, X., Kuang, B. and Gao, J. 2014. Numerical simulation and experimental investigation on friction stir welding of 6061-T6 aluminum alloy. Materials & Design. 60:94-101. doi:10.1016/j.matdes.2014.03.043.
[6] Kumar, R., Kumar, H., Kumar, S. and Chohan, J.S. 2022. Effects of tool pin profile on the formation of friction stir processing zone in AA1100 aluminium alloy. Materials Today: Proceedings. 48:1594-1603. doi:10.1016/j.matpr.2021.09.491.
[7] Marzban, M.J., Behgozin, S.A., Janghorban, M. and Afsari, A. 2022. Investigating the Effect of the Number of Passes and Tool Design in the Friction-Stirring Process on the Grain Size, Hardness and Wear Resistance of Ck45 Steel. Iranian Journal of Manufacturing Engineering. 9(7):29-38. doi:10.22034/ijme.2022.163350.
[8] Niazi, M., Afsari, A., Behgozin, A. and Nazemosadat, M.R. 2023. Multi-objective optimization of kinematic tool parameters in FSW of Al-7075 and Al-6061 alloys by RSM. Journal of Welding Science and Technology of Iran. 9(1):17-29. doi:10.47176/JWSTI.2023.02.
[9] Elyasi, M., Taherian, J., Hosseinzadeh, M., Kubit, A. and Derazkola, H.A. 2023. The effect of pin thread on material flow and mechanical properties in friction stir welding of AA6068 and pure copper. Heliyon. 9(4). doi:10.1016/j.heliyon.
[10] Soleimani, H., Amini, K. and Gharavi, F. 2022. Effect of tool position on microstructural and mechanical properties of friction stir butt welded joint of AA2024–AA7075 dissimilar alloys. Journal of Welding Science and Technology of Iran. 7(2):47-58. dor:20.1001.1.2476583.1400.7.2.2.5.
[11] Afsari, A., Rahbar, A., Janghorbanb, M. and Jahanbeen, B. 2023. Investigation of Tribological Properties of Nano-Composite Copper/Titanium Dioxide Alloy Produced Using Friction-Stir Process. Journal of Science and Technology of Composites. doi:10.22068/jstc.2023.1974326.1814.
[12] Ahmed, S., Rahman, R.A.U., Awan, A., Ahmad, S., Akram, W., Amjad, M., Yahya, M.Y. and Rahimian Koloor, S.S. 2022. Optimization of process parameters in friction stir welding of aluminum 5451 in marine applications. Journal of Marine Science and Engineering. 10(10):1539. doi:10.3390/jmse10101539.
[13] Ambrosio, D., Wagner, V., Vivas, J., Dessein, G., Aldanondo, E. and Cahuc, O. 2023. Advances in friction stir welding of Ti6Al4V alloy complex geometries: T-butt joint with complete penetration. Archives of Civil and Mechanical Engineering. 23(3):182. doi:10.1007/s43452-023-00717-4.
[14] Aali, M. 2020. Investigation of spindle rotation rate effects on the mechanical behavior of friction stir welded Ti 4Al 2V alloy. Journal of Welding and Joining. 38(1):81-92. doi:10.5781/JWJ.2020.38.1.9.
[15] Tang, J. and Shen, Y. 2017. Effects of preheating treatment on temperature distribution and material flow of aluminum alloy and steel friction stir welds. Journal of Manufacturing Processes. 29:29-40. doi:10.1016/j.jmapro.2017.07.005.
[16] Chen, J., Shi, L., Wu, C. and Jiang, Y. 2021. The effect of tool pin size and taper angle on the thermal process and plastic material flow in friction stir welding. The International Journal of Advanced Manufacturing Technology. 116:2847-2860. doi:10.21203/rs.3.rs-335152/v1.