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AUTHOR(S):

K.Kalaiselvan, A.Elango

 

TITLE

Effect of butt joint distortion on Ti/Al dissimilar metal using Laser beam welding

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ABSTRACT

In general, it is desirable to finish the weld quickly, before a large volume of surrounding metal heats up and expands. The welding process used, type, welding current and speed of travel, thus, affect the degree of shrinkage and distortion of a weldment. The use of mechanized welding equipment reduces welding time, metal affected zone and consequently distortion. This article helps to define what weld distortion is and then provide a practical understanding of the causes of distortion, effects of shrinkage in butt joint welded assemblies using Titanium Grade5 and Aluminium AA2024 alloy sheet. The beam offset position to the joint interface towards titanium and aluminium side. The factors affecting distortion during welding is also given. Test results reveal that welding speed is the significant parameter to decide the extent of distortion. Also welding from Al side reduces the distortion while Ti side increases the distortion.

KEYWORDS

Pulsed Nd: YAG Laser welding, Titanium/Aluminium thin sheet but joint, distortion

REFERENCES

[1] J. Polmear: Control of precipitation processes and properties in aged aluminium alloys by trace element additions. Proc. 6th Intl Conf on Aluminium Alloys, ICAA6, Toyohashi, Japan, July 5–10, 1998, eds. T. Sato, S. Kumai, T. Kobayshi and Y. Murakami, The Japan Inst. of Light Metals, 1998, Tokyo, Japan, pp. 75–86.

[2] Y. C. Chen and K. Nakata, “Microstructural characterization and mechanical properties in friction stir welding of aluminum and titanium dissimilar alloys”, Materials and Design, vol. 30, no. 3, pp. 469-474, 2009.

[3] Katayama Seiji, “Laser welding”, Journal of the Japan welding society, vol. 78, no. 2, pp. 124-138, 2009 (in Japanese).

[4] Katayama Seiji, “Laser welding for manufacturing innovation”, Journal of the Japan welding society, vol. 78, no. 8, pp. 682-692, 2009 (in Japanese).

[5] A. K. Mukhopadhyay, G. J. Shiflet, and E. A. Starke: The role of trace alloy additions on precipitation in age hardenable aluminium alloys. In Morris E. Fine Symposium, P. K. Liaw, J. R. Weertman, H. L. Marcus, and J. S. Santner, eds., TMS, Warrendale, PA, pp. 283–293 (1991).

[6] P L. Threadgill. The prospects for joining titanium aluminides [J]. Mater Sci Eng A, 1995, 192−193: 640−646.

[7] I.J. Polmear: Light Alloys, from traditional alloy to nanocrystals, 4th edn, (2006), Butterworth-Heinemann.

[8] L.W. Tsay and C.Y. Tsay: The effect of microstructures on the fatigue crack growth in Ti6Al4V laser welds, Int. J. Fatigue, (1997), 19 (10), 713-720.

[9] F.J. Gil, M.P Ginebra, J.M. Manero and J.A. Planell: Formation of α-Widmanstätten structure: effect of grain size and cooling rate on the Widmanstätten morphologies and on the mechanical properties in Ti6Al4V alloy, Journal of Alloy and compounds, (2001), 329,142-152.

[10] American Welding Society: Recommended Practices for Laser Beam Welding, Cutting and Drilling,(1998),AWS/ANSI.

[11] P.Balashanmugam, G. Balasubramaian. “Control of Distortion During Welding and Stress Relieving of BURNER Panel Assembly”, Volume : 4 | Issue : 4 | Apr 2014 | ISSN - 2249-555X.

[12] MichalerisI P, Sun X. Finite element analysis of thermal tensioning techniques mitigating weld buckling distortion [J]. Welding Journal, 1997, 76(11): 451−457.

[13] Park J U, Lee H W, Bangh H S. effect of mechanical constraints on angular distortion of welding joints [J]. Science and Technology of Welding and Joining, 2002, 7(4): 232−239.

[14] Miyasaka F, Yamane Y, Ohji T. Development of circumferential TIG welding process model: A simulation model for welding of pipe and plate [J]. Science and Technology of Welding and Joining, 2005, 10(5): 521−527.

[15] Gery D, Long H, Maropoulos P. Effects of welding speed, energy input and heat source distribution on temperature variations in butt joint welding [J]. Journal of Materials Processing Technology, 2005, 167: 393−401.

[16] Song.N, Nakata.K, Wu.A and Liao, Interfacial microstructure and mechanical property of TI6AL4V/6061 dissimilar joint by direct laser brazing without filler metal and groove”.Mat.Sci.Eng.A560,111- 120(2013).

[17] Caiazzo.F, Alfieri.V, Cardaropoli.F and Sergi.V “Butt autogenous laser welding of AA2024 aluminiumalloy thin sheets with a Yb:YAG disk laser”. Int.J.Adv.Manuf.Technol..(2013).

Cite this paper

K.Kalaiselvan, A.Elango. (2017) Effect of butt joint distortion on Ti/Al dissimilar metal using Laser beam welding. International Journal of Theoretical and Applied Mechanics, 2, 157-163

 

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