Microstructure and mechanical properties of friction-stir welded St52 steel joints
- 52 Downloads
The aim of this work is to investigate the mechanical properties and microstructures of friction-stir welded (FSWed) St52 structural steel joints. In this study, St52 steel plates with a thickness of 4 mm were butt-welded by friction-stir welding (FSW) using a tungsten carbide tool having a conical pin. The microstructure of the welded zone consists of equiaxed fine ferrite, grain boundary ferrite, Widmanstatten ferrite, and aggregates of ferrite + cementite. The microhardness measurements showed that the hardness of the welded zone was significantly higher than that of the base metal. The FSWed St52 joint exhibited a significant strength overmatching in the weld region and a strength performance similar to or slightly higher than that of the base plate.
Keywordsfriction-stir welding St52 steel microstructure mechanical properties
Unable to display preview. Download preview PDF.
- W.M.N. Thomas, E.D. Nicholas, C. Needham, M.G. Murch, P. Templesmith, and C.J. Dawes, Friction Stir Butt Welding, Int. Patent Appl. PCT/GB92/02203 and GB Patent Appl. 9125978.8, 1991, and US Patent Appl. 5460317, 1995.Google Scholar
- G. Çam, G. İpekoğlu, T. Küçükömeroğlu, and S.M. Aktarer, Applicability of friction stir welding to steels, J. Achv. Mater. Manuf. Eng., 80(2017), No. 2, p. 65.Google Scholar
- F.C. Liu, Y. Hovanski, M.P. Miles, C.D. Sorensen, and T.W. Nelson, A review of friction stir welding of steels: Tool, material flow, microstructure, and properties, J. Mater. Sci. Techol., (34)2018, No. 1, p. 39.Google Scholar
- A.J. Ozekcin, H.W. Jin, J.Y. Koo, N.V. Bangaru, R. Ayer, G. Vaughn, R. Steel, and S. Packer, A microstructural study of friction stir welded joints of carbon steels, Int. J. Offshore Polar Eng., 14(2004). No. 4, p. 284.Google Scholar
- G. İpekoğlu, S. Erim, and G. Çam, Investigation into the influence of post–weld heat treatment on the friction stir welded AA6061 Al–alloy plates with different temper conditions, Metall. Mater. Trans. A, 45(2014), No. 2, p. 864.Google Scholar
- G. İpekoğlu, S. Erim, B. G. Kıral, and G. Çam, Investigation into the effect of temper condition on friction stir weldability of AA6061 Al–alloy plates, Kovove Mater., 51(2013), No. 3, p. 155.Google Scholar
- G. İpekoğlu, B.G. Kıral, S. Erim, and G. Çam, Investigation of the effect of temper condition on friction stir weldability of AA7075 Al–alloy plates, Mater. Tehnol., 46(2012), No. 6, p. 627.Google Scholar
- G. Çam, V. Ventzke, J.F. Dos Santos, M. Koçak, G. Jennequin, P. Gonthier–Maurin, M. Penasa, and C. Rivezla, Characterization of laser and electron beam welded Al–alloys, Prakt. Metallogr., 37(2000), No. 2, p. 59.Google Scholar
- T. Küçükömeroğlu, E. Şentürk, L. Kara, G. İpekoğlu, and G. Çam, Microstructural and mechanical properties of friction stir welded nickel–aluminum bronze (NAB) alloy, J. Mater. Eng. Perform., 25(2016,) No. 1, p. 320.Google Scholar
- G. Çam, S. Mistikoglu, and M. Pakdil, Microstructural and mechanical characterization of friction stir butt joint welded 63%Cu−37%Zn brass plate, Weld. J., 88(2009), No. 11, p. 225S.Google Scholar