Microstructure and Mechanical Behaviuor of Rotary Friction Welded Titanium Alloys

Authors: M. Avinash, G. V. K. Chaitanya, Dhananjay Kumar Giri, Sarala Upadhya, B. K. Muralidhara

Abstract:

Ti-6Al-4V alloy has demonstrated a high strength to weight ratio as well as good properties at high temperature. The successful application of the alloy in some important areas depends on suitable joining techniques. Friction welding has many advantageous features to be chosen for joining Titanium alloys. The present work investigates the feasibility of producing similar metal joints of this Titanium alloy by rotary friction welding method. The joints are produced at three different speeds and the performances of the welded joints are evaluated by conducting microstructure studies, Vickers Hardness and tensile tests at the joints. It is found that the weld joints produced are sound and the ductile fractures in the tensile weld specimens occur at locations away from the welded joints. It is also found that a rotational speed of 1500 RPM can produce a very good weld, with other parameters kept constant.

Keywords: Rotary friction weld, rotational speed, Ti-6Al-4V, weld structures.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1078985

References:

[1] P T Houldcroft, "Welding Process technology", Cambridge University Press, Cambridge 1977,p1.
[2] "Exploiting Friction Welding in Production", Information Package Series, The Welding Institute, Cambridge, 1979.
[3] U. Kamachi Mudali, B.M. Ananda Rao, K. Shanmugam, R. NAtarajan, Baladev Raj "Corrosion and Microstructural Aspects of Dissimilar Metals Joints of Titanium and Type 304L Stainless steel" Journal of Nuclear Materials 321, pp. 40-48.
[4] N.Ozdemir, F.Sarsirlmaz, A.Hascalik "Effect of Rotational Speed on Interface Properties of frictional Welded AISI -304L to 4340 Steel" Materials & Design, Vol 28, Issue 1,2007, pp 301-307.
[5] S. FuKumoto, H. Tsubakino, K.Okita, M.Aritoshi "Friction Welding Process of 5052 Aluminum alloy to 304 Stainless steel" materials science & Technology, Vol 15, Number 9, Sept 1999, pp 1080-1806.
[6] T. Shinoda, K.Miyahara,M.Ogawa, S. Endo "Friction Welding of Aluminium And Plain Low Carbon Steel" Welding International (UK), Vol 15, No.6, 2001, pp435-445.
[7] A. Vairis, M.Frost "High Frequency Linear Friction Welding of a Titanium Alloy" Wear, Vol 217,1998, pp 117-131.
[8] C. Kwietniewski, J. F. dos Santo, A.A. M da Silva, L. Pereira, T. R. Strohaecker, A. Reguly " Effect of Plastic Deformation on the Toughness Behaviuor of Radial Friction Welds of Ti-6Al-4V-0.1Ru Titanium Alloy" Materials Science & engineering A ,Vol 417 , 2006, pp 49-55.
[9] P. D. Sketchley, P.L.Threadfill, I.G. Wright " Rotary Friction Welding of an Fe3Al based ODS Alloy" Materials Science & Engineering A, Vol 329-331, June 2002, pp756-782.
[10] Paul Danielson, R. Wilson,D Alman,"Microstructure of Titanium Welds-, U S Department of Energy, Albany Research Center.