The Effect of Travel and Rotational Speeds on the Mechanical Properties of Al2024 in Underwater Friction Stir Welding

Subject Areas : Journal of Environmental Friendly Materials

R. Azarafza ¹ , A. Rabieifar ² , A. Rezaei ³ , S. Nategh ⁴

1 - University Complex Materials and Manufacturing Technologies of Maleke Ashtar University, Tehran, Iran.
2 - Department of Materials Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran.
3 - University Complex Materials and Manufacturing Technologies of Maleke Ashtar University, Tehran, Iran.
4 - Materials Science and Engineering Department, Sharif University of Technology, Tehran, Iran.

Received: 2017-08-31 Accepted : 2017-08-31 Published : 2017-09-01

Keywords:

Abstract :

In this research, the friction stir welding was performed underwater in order to evaluate and improve the mechanical properties of aluminum 2024 alloy. Welding samples were compared with the samples in the air welding. The results showed that samples of the underwater welding in case the rotational speed is 1000 RPM and feed rate is in 80 mm/min, has the highest tensile strength, also they obtain the highest hardness at a rotational speed of 1000 RPM and forward speed of 100 mm/min. Also, an increase of travel speed reduces deformation of the material, heat input and soft area width during the welding process and increases hardness of TMAZ and HAZ. With increasing rotational speed, heat input and soft area width increased. This will, on the one hand, decrease the hardness of TMAZ and HAZ and, on the other hand, increase the stiffness of the disturbance area. Increasing hardness also ultimately improves the tensile strength of the welding joint.

References:

[1] P. L. Threadgill, A. J. Leonard, H. R. Shercliff and P. J. Withers, Int. Mater. Rev., 54(2009), 49.

[2] R. Mirjalili, The Study of Microstructure and Mechanical Properties of 2017 Alloy in Friction-Stir Welding, Ph.D Thesis, Sharif University, Tehran, Iran, (2011).

[3] Hua-Bin Chen, K. Y. Mishra, Mater. Sci. Eng. R, 50(2005), 54.

[4] M. Mirazizi, The Friction-Stir Welding of Al7075 Alloy, Master's thesis, Sharif University, Tehran, Iran, (2008).

[5] H. Liu, J. Mater. Process. Technol., 142(2003), 692.

[6] R. Rao, H. Raikoty, and G. talia, Structural Dynamics and Materials Conference, Proc. 46th AIAA/ASME/ASCE/AHS/ASC Structures, Texas, (2005), 362.

[7] Y. S. Sato, H. Kokawa, M. Enmoto and S. Jogan, Metall. Mater. Trans. A, 30(1999), 24.

[8] H. Sabet, M. Sadeghi, M. Mohammadihkah, N. Mirzamohamad and M. Khalili, New. Mat, 2(2011), 83.

[9] Z. M. L. C. S. R. Ren, Scripta Mater., 56(2007), 69.

[10] W. Tang, X. Guo, J. C. McClure and L. E. Murr, J. Mater. Process. Manuf. Sci., 7(1998), 163.

[11] N. Rajamanickam, V. Balusamy, R.G. Madhusudhanna and K. Natarajan, Mater. Des., 30(2009), 2726.

[12] Y. M. Hwang, Z. W. Kang, Y. C. Chiou and H. H. Hsu, Int. J. Machi. Tool. Manu., 48(2008), 778.

[13] T. Hirata, T. Oguri, H. Hagino, T. Tanaka, S. W. Chung, Y. Takigawa and K. Higashi, Mater. Sci. Eng. A, 456(2007), 344.

[14] C. G. Rhodes, M. W. Mahoney, W. H. Bingel, R. A. Spurling and C. C. Bampton, Scripta Mater., 36(1997), 69.

[15] M. Guerra, J. C. McClure, L. E. Murr, A. C. Nunes, K. V. Jata, M. W. Mahoney, R. S. Mishra, S. L. Semiatin and D. P. Filed, TMS, 52(2001),  25.

[16] W. Tang, X. Guo, J. C. McClure and L. E. Murr, J. Mater. Process. Manuf. Sci., 7(1998), 163.

[17] P. Vilaca, L. Quintino and J. F. Santos, J. Mater. Process. Technol., 69(2005), 452.