Abstract
Friction stir welding (FSW) of 2219-T6 aluminum alloy assisted by external non-rotational shoulder was carried out, and effects of the welding speed on microstructures and mechanical properties were investigated in detail. Defect-free joints were obtained in a wide range of welding speeds from 50 to 300 mm/min. The microstructural deformation and weld formation were dominated by the rotating tool pin and subsize concave shoulder but the non-rotational shoulder exerted very little effects for all joints. Compared with the weld obtained by conventional FSW, less intense stirring effects in FSW assisted by external non-rotational shoulder can only generate a narrower thermomechanically affected zone, whose width decreased with increasing of the welding speed. Microstructures and Vickers hardness distributions showed that this new welding process is beneficial to improving the asymmetry and inhomogeneity, especially in the weld nugget zone. The maximum tensile strength was up to 69 % of the base material.
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References
Mishra RS, Ma ZY (2005) Friction stir welding and processing. Mater Sci Eng R 50:1–78
Nandan R, Debroy T, Bhadeshia HKDH (2008) Recent advances in friction-stir welding—process, weldment structure and properties. Prog Mater Sci 53:980–1023
Elangovan K, Balasubramanian V (2008) Influences of tool pin profile and welding speed on the formation of friction stir processing zone in AA2219 aluminium alloy. J Mater Process Tech 200:163–175
Hosain M D (2004) Development of high speed friction stir welding machine. MS Thesis, Mechanical Engineering Department, Wichita State University, Wichita, KS
Able N, Pfefferkorn F (2005) Laser-assisted friction stir lap welding of aluminum. ASME Summer Heat Transfer Conference, San Francisco
Liu HJ, Guo N, Feng JC (2006) Friction stir welding assisted by micro-plasma arc. Proceedings of the 6th International Symposium on Friction Stir Welding, Montreal, Canada
Roa RSA (2004) Microstructure and mechanical properties of high speed friction stir welded aluminum alloys. MS Thesis, Mechanical Engineering Department, Wichita State University, Wichita, KS
Crawford R, Bloodworth T, Cook GE, Strauss AM, Hartman DA (2006) High speed friction stir welding process modeling. Proceedings of the 6th International Symposium on Friction Stir Welding, Montreal, Canada
Widener CA, Talia JE, Tweedy BM, Burford DA (2006) High-rotational speed friction stir welding with a fixed shoulder. Proceedings of the 6th International Symposium on Friction Stir Welding, Montreal, Canada
Nicholas T (2009) Advances in high rotational speed–friction stir welding for NAVAL applications. Bachelor Thesis, Mechanical Engineering Department, Wichita State University, Wichita, KS
Wynne BP, Threadgill PL, Davies PS, Thomas MJ, Ng BS (2008) Microstructure and texture in static shoulder friction stir welds of Ti-6Al-4V. Proceedings of the 7th International Friction Stir Welding Symposium, Awaji Island, Japan
Davies PS, Wynne BP, Rainforth WM, Thomas MJ, Threadgill PL (2011) Development of microstructure and crystallographic texture during stationary shoulder friction stir welding of Ti-6Al-4V. Metall Mater Trans A 42:2278–2289
Ahmed MMZ, Wynne BP, Rainforth WM, Threadgill PL (2011) Through-thickness crystallographic texture of stationary shoulder friction stir welded aluminium. Scripta Mater 64:45–48
Buffa G, Fratini L, Arregi B, Penalva M (2010) A new friction stir welding based technique for corner fillet joints: experimental and numerical study. Int J Mater Form 3:1039–1042
Martin JP, Stanhope C, Gascoyne S (2011) Novel techniques for corner joints using friction stir welding. In: Mishara R, Mahoney MW, Sato Y, Hovanski Y, Verma R (eds) Friction stir welding and processing VI. Wiley, Hoboken, pp 179–186
Krishnan KN (2001) On the formation of onion rings in friction stir welds. Mater Sci Eng, A 327:246–251
Chen ZW, Cui S (2008) On the forming mechanism of banded structures in aluminium alloy friction stir wells. Scripta Mater 58:417–420
Teimournezhad J, Masoumi A (2010) Experimental investigation of onion ring structure formation in friction stir butt welds of copper plates produced by non-threaded tool pin. Sci Technol Weld Join 15:166–170
Xu WF, Liu JH, Luan GH, Dong CL (2009) Microstructure and mechanical properties of friction stir welded joints in 2219-T6 aluminum alloy. Mater Design 30:3460–3467
Arora KS, Pandey S, Schaper M, Kumar R (2010) Effect of process parameters on friction stir welding of aluminum alloy 2219-T87. Int J Adv Manuf Technol 50:941–952
Fonda RW, Bingert JF (2006) Precipitation and grain refinement in a 2195 Al friction stir weld. Metall Mater Trans A 37:3593–3604
Simar A, Brechet Y, Meester BD, Denquin A, Pardoen T (2008) Microstructure, local and global mechanical properties of friction stir welds in aluminium alloy 6005A-T6. Mater Sci Eng, A 486:85–95
Liu HJ, Chen YC, Feng JC (2006) Effect of heat treatment on tensile properties of friction stir welded joints of 2219-T6 aluminium alloy. Mater Sci Technol 22:237–241
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Liu, H.J., Li, J.Q. & Duan, W.J. Friction stir welding characteristics of 2219-T6 aluminum alloy assisted by external non-rotational shoulder. Int J Adv Manuf Technol 64, 1685–1694 (2013). https://doi.org/10.1007/s00170-012-4132-1
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DOI: https://doi.org/10.1007/s00170-012-4132-1