Superplasticity of Friction-Stir Welds of Zr-Modified 5083 Aluminum Alloy with Ultrafine-Grained Structure


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The commercial Zr-modified 5083 aluminum alloy was homogenized to precipitate nanoscale Al6Mn particles and then undergone to equal-channel angular pressing (ECAP) at 300 °C to a true strain of ~12 via BC route. The obtained ultrafine-grained material was subjected to friction-stir welding (FSW). The welding variables were selected to provide reasonable homogeneous microstructure distribution across the weld zone and thus to ensure a highly uniform elongation during subsequent superplastic tests of the joints. Superplastic behavior of the obtained welds is discussed.



Edited by:

Goroh Itoh, Rustam Kaibyshev, Eric M. Taleff, Marina Tikhonova and Dr. Eiichi Sato




S. Mironov et al., "Superplasticity of Friction-Stir Welds of Zr-Modified 5083 Aluminum Alloy with Ultrafine-Grained Structure", Defect and Diffusion Forum, Vol. 385, pp. 15-20, 2018

Online since:

July 2018




* - Corresponding Author

[1] R.Z. Valiev, T.G. Langdon, Principles of equal-channel angular pressing as a processing tool for grain refinement, Prog. Mater. Sci. 51 (2006) 881–981..


[2] Y. Estrin, A. Vinogradov, Extreme grain refinement by severe plastic deformation: A wealth of challenging science, Acta Mater. 61 (2013) 782–817..


[3] F.C. Liu, Z.Y. Ma, Achieving exceptionally high superplasticity at high strain rates in a micrograined Al–Mg–Sc alloy produced by friction stir processing, Scr. Mater. 59 (2008) 882–885..


[4] M.A. García-Bernal, R.S. Mishra, R. Verma, D. Hernández-Silva, High strain rate superplasticity in continuous cast Al–Mg alloys prepared via friction stir processing, Scr. Mater. 60 (2009) 850–853..


[5] R. Kaibyshev, D. Zhemchuzhnikova, A. Mogucheva, Effect of Mg Content on High Strain Rate Superplasticity of Al-Mg-Sc-Zr Alloys Subjected to Equal-Channel Angular Pressing, Mater. Sci. Forum. 735 (2012) 265–270..


[6] R.S. Mishra, Z.Y. Ma, Friction stir welding and processing, Mater. Sci. Eng. R Rep. 50 (2005) 1–78..

[7] F.C. Liu, P. Xue, Z.Y. Ma, Microstructural evolution in recrystallized and unrecrystallized Al–Mg–Sc alloys during superplastic deformation, Mater. Sci. Eng. A. 547 (2012) 55–63..


[8] S. Malopheyev, S. Mironov, I. Vysotskiy, R. Kaibyshev, Superplastic Behavior of Friction-Stir Welded Joints of an Al-Mg-Sc Alloy with Ultrafine-Grained Microstructure, Mater. Sci. Forum. 838–839 (2016) 338–343..


[9] I. Nikulin, A. Kipelova, S. Malopheyev, R. Kaibyshev, Effect of second phase particles on grain refinement during equal-channel angular pressing of an Al–Mg–Mn alloy, Acta Mater. 60 (2012) 487–497..


[10] S. Malopheyev, R. Kaibyshev, Strengthening mechanisms in a Zr-modified 5083 alloy deformed to high strains, Mater. Sci. Eng. A. 620 (2015) 246–252..