Abstract
This study aims to investigate the effect of post-weld heat treatment on the corrosion behavior of different weld zones of titanium Ti-6Al-4V alloy by friction stir welding. Thus, the friction stir welding was used to join 3-mm-thick sheets of Ti-6Al-4V titanium alloy. Then, the welded sample from the optimal conditions underwent normalized heat treatment at 950 °C for 1 h in an argon inert gas environment. Next, the microstructures of different weld zones were examined using field emission scanning electron microscopy (FESEM), elemental analysis via EDS, phase analysis by XRD, and corrosion behavior through potentiostat equipment in HCl 5% solution. The results obtained from post-weld heat treatment also indicated that these operations significantly enhance the potential and converge the corrosion rate of different weld zones. Specifically, if the corrosion rate of the transition zone before heat operations is around 3.5 times that of the friction stir zone and 10 times that of the base metal, this difference will be less than 2.5 times that of the friction and 4 times that of the base metal following post-weld heat treatment. The post-weld heat treatment has reduced the difference in corrosion rate across various weld zones, but it has not made any changes in the corrosion rate of welds obtained at different traverse speeds.
References
A.R. Nasresfahani, A.R. Soltanipur, K. Farmanesh, and A. Ghasemi, The Effect of Friction Stir Welding on Corrosion Behavior of Ti-6Al-4V, J. Mater. Eng. Perform., 2017, 26, p 4311–4318. https://doi.org/10.1007/s11665-017-2917-y.
T. Fukuzuka, K. Shermogori, H. Satoh, and F. Kamikubo, Effect of Heat Treatment on Corrosion Resistance and Hydrogen Absorbtion of Commercially pure Titanium, 4th International Conference on Titanium, 1981, p 2685.
V.S. Raja, R.D. Angal, and M. Suresh, Effect of Widmanstatten Structure on Protection Potential of Ti-6Al-2Sn-4Zr-2Mo (0.1Si) alloy in 1 M NaBr Solution, Corros. Sci., 1993, 49, p 2–7.
A. Ravi Shankar, R.K. Dayal, R. Balasubramaniam, V.R. Raju, R. Mythili, S. Saroja, M. Vijayalakshmi, and V.S. Raghunathan, Effect of Heat Treatment on the Corrosion Behavior of Ti-5Ta-1.8Nb Alloy in Boiling Concentrated Nitric Acid, J. Nucl. Mater., 2008, 372, p 277–284.
M.R. Abou Shahba, A. Waffa, E. Azza, S. Amal, and M. Safaa, Corrosion and Inhibition of Ti-6Al-4V Alloy in NaCl Solution, Int. J. Electrochem. Sci., 2011, 6, p 5499–5509.
V. Zwilling, E. Darque-Ceretti, A. Boutry-Forveille, D. David, M.Y. Perrin, and M. Aucouturier, Structure and Physicochemistry of Anodic Oxide Films on Titanium and Ti-6Al-4V Alloy, Surf. Interface Anal., 1999, 27, p 629.
M. Metikos-Hukovic, A. Kwokal, and J. Piljac, The Influence of Niobium and Vanadium on Passivity of Titanium Based Implants in Physiological Solution, Biomaterials, 2003, 24, p 3765–3775.
S.S. Ushkov and A.S. Kudryavtsev, The Main Problems of Titanium and Titanium Alloys Civil Application, USSR, 1993.
E.N. Codaro, R.Z. Nakazato, A.L. Horovistiz, L.M.F. Ribeiro, R.B. Ribeiro, and L.R.O. Hein, An Image Analysis Study of Pit Formation on Ti-6Al-4V, Mater. Sci. Eng. A, 2003, 341, p 202–210.
S. Sundaresan, G.D.J. Ram, and G.M. Reddy, Microstructural Refinement of Weld Fusion Zone in Alph/Betha Titanium Alloys Using Pulsed Current Welding, Mater. Sci. Eng. A, 1999, 262, p 88–100.
L. Zhou, H.J. Liu, P. Liu, and Q.W. Liu, The Stir Zone Microstructure and Its Formation Mechanism in Ti-6Al-4V Friction Stir Welds, Scripta Mater., 2009, 61(6), p 596–599.
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Nasresfahani, A., Soltanipur, A.R., Farmanesh, K. et al. The Effect of Post-weld Heat Treatment on the Corrosion Behavior of Different Weld Zones of Titanium Ti-6Al-4V Alloy by Friction Stir Welding. J. of Materi Eng and Perform 29, 6784–6789 (2020). https://doi.org/10.1007/s11665-020-05115-y
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DOI: https://doi.org/10.1007/s11665-020-05115-y