Comparision of Experimental and Simulated Weld Bead Geometry by Varying the Weld Speed in TIG Welded AA7075 Aluminium Alloy

• Autorzy: Bosco Jude S. , Jinu G. R. , Arul Franco P.
• Języki publikacji: EN

Abstrakty

EN

In this present study, Aluminium Alloy material (AA7075) is selected as the investigation material in which TIG welding process was utilized for welding and the temperature analysis was carried out. The same was simulated using ANSYS software by finite element technique considering the characteristics and advantage of TIG welding process than other sources for welding of aluminium alloys. A travel heat source combined with body loads was designed by analyzing thermal physical parameters, latent heat of fusion of material. The weld model was created by using Solid modeling and direct generation technique. Residual control method was taken for precise node selection. The simulation was carried out by varying the welding speed process parameter of TIG welding and keeping current & voltage as constant. The quasisteady state temperature field of TIG welding was simulated with the FEA software (ANSYS) as well as experimental tests. The main objective of this work is to compare the experimentally obtained weld bead geometry parameters such as bead width and depth of penetration of AA7075 welded joint with simulated results from ANSYS software for various weld speeds. From the results it is indentified that for the sample welded at 120 mm/min is having higher weld bead geometry when compared to the samples welded at 130 mm/min and 140 mm/min. The lower bead geometry is obtained for the sample welded at 140 mm/min is due to the application of less heat energy as input. Similarly for 130 mm/min lower bead geometry is obtained because less heat energy is spent on joining. Joining of two metals or alloys is important in every aspect of engineering which leads to welding in an effective manner and carrying out the analysis. The experimental analysis shows that the model is showing good agreement with the experimental results. Comparison of the experimental and simulated results shows the maximum deviation of 6.24 % and 6.28 % is obtained for calculating the bead width and depth of penetration, respectively. Keywords: TIG welding, AA7075, Simulation, Weld Bead Geometry, ANSYS.

Słowa kluczowe

EN

TIG welding; AA7075; simulation; Weld Bead Geometry; ANSYS

PL

symulacja; aluminium; AA7075

• Wydawca: Wydawnictwo Politechniki Łódzkiej
• Czasopismo: Mechanics and Mechanical Engineering
• Rocznik: 2016
• Tom: Vol. 20, nr 4
• Strony: 377--392
• Opis fizyczny: Bibliogr. 23 poz.

Twórcy

autor

Bosco Jude S.

• Department of Mechanical Engineering University VOC College of Engineering Thoothukudi, Tamilnadu 628 008, India

autor

Jinu G. R.

• Department of Mechanical Engineering University College of Engineering Nagercoil, Tamilnadu 629 004, India

autor

Arul Franco P.

Bibliografia

• [1] David, S. A. and DebRoy, T.: Current issues and problems in welding science, Science, 257, 5069, 497–502, 1992.
• [2] Zacharia, T., Vitek, J. M., Goldak, J. A., DebRoy, T., Rappaz, M. and Bhadeshia, H. K.: Modeling of fundamental phenomena in welds, Modelling and Simulation in Materials Science and Engineering, 3, 2, 265–288, 1995.
• [3] Papazoglou, V. J. and Masubuchi, K.: Numerical analysis of thermal stresses during welding including phase transformation effects, Journal of Pressure Vessel Technology, 104, 3, 198–203, 1982.
• [4] Reddy, J. N.: On penalty function methods in the finite element analysis of flow problems, International Journal for Numerical Methods, 2, 2, 151–171, 1982.
• [5] Oden, J. T., Kikuchi, N. and Song, Y. J.: Penalty-finite element methods for the analysis of stokesian flows, Computer Methods in Applied Mechanics and Engineering, 31, 3, 297–329, 1982.
• [6] McLay, R. and Carey, G. F.: Coupled heat transfer and viscous flow, and magnetic effects in weld pool analysis, International Journal for Numerical Methods in Fluids, 9, 6, 713–730, 1989.
• [7] De, A. and DebRoy, T.: Probing unknown welding parameters from convective heat transfer calculation and multivariable optimization, Journal of Physics, D, 37, 1, 140–150, 2004.
• [8] Giedt, W. H., Wei, X.-C. and Wei, S.-R.: Effect of surface convection on stationary GTA weld zone temperatures, Welding Journal, 63, 12, 376–383, 1984.
• [9] Lukens, W. E. and Morris, R. A.: Infrared temperature sensing of cooling rates for arc welding control, Welding Journal, 61, 1, 27–33, 1982).
• [10] Kovacevic, R., Zhang, Y. M. and Ruan, S.: Sensing and control of weld pool geometry for automated GTA welding, Journal of Engineering for Industry, 117, 2, 210–222, 1995.
• [11] Pitscheneder, W., Ebner, R., Hong, T., DebRoy, T., Mundra, K. and Benes, R.: Development of a finite element based heat transfer model for conduction mode laser spot welding process using an adaptive volumetric heat source, of the 4th International Seminar on Numerical Analysis of Weldability, 379–395, 1997.
• [12] Rosenthal, D.: Mathematical theory of heat distribution during welding and cutting, Welding Journal, 20, 5, 220–234, 1941.
• [13] Goldak, J., Chakravarti, A. and Bibby, M.: A new finite element model for welding heat sources, Metallurgical Transactions B, 15, 2, 299–305, 1984.
• [14] Guo, W. and Kar, A.: Determination of weld pool shape and temperature distribution by solving three–dimensional phase change heat conduction problem, Science and Technology of Welding and Joining, 5, 5, 317–323, 2000.
• [15] Chang, W. S. and Na, S. J.: A study on the prediction of the laser weld shape with varying heat source equations and the thermal distortion of a small structure in micro–joining, Journal of Materials Processing Technology, 120, 1–3, 208–214, 2002.
• [16] Dutta, P., Joshi, Y. and Franche, C.: Determination of gas tungsten arc welding efficiencies, Experimental Thermal and Fluid Science, 9, 1, 80–89, 1994.
• [17] Zhang, W. , Roy, G. G., Elmer, J. W. and DebRoy, T.: Modeling of heat transfer and fluid flow during gas tungsten arc spot welding of low carbon steel, Journal of Applied Physics, 93, 5, 3022–3033, 2003.
• [18] Zhang, W., Roy, G. G., Elmer, J. W. and DebRoy, T.: Modeling of heat transfer and fluid flow during GTA spot welding of 1005 steel, Journal of Applied Physics, 93, 3022–3033, 2003.
• [19] Sathiya, P., Jinu, G. R. and Navjot Singh: Simulation of weld bead geometry in GTA welded Duplex Stainless Steel(DSS), Scholarly Research Exchange, ID 324572, doi 10.3814/2009/324572, 2009.
• [20] Durgutlu, A.: Experimental Investigation of the Effect of Hydrogen in Argon as a Shielding Gas on TIG Welding of Austenitic Stainless Steel, Mater. Design, 25, 1, 19, 2004.
• [21] Yan, J., Gao, M. and Zeng, X.: Study on Microstructure and Mechanical Properties of 304 Stainless Steel Joints by TIG, Laser and Laser–TIG Hybrid Welding, Opt. Laser Eng, 48, 4, 512, 2010.
• [22] Sathiya, P., Aravindan, S., Soundarajan, R. and Noorulhaq, A.: Effect of Shielding Gases on Mechanical and Metallurgical Properties of Duplex Stainless–steel Welds, J. Mater. Sci., 44, 1, 114, 2008.
• [23] George, E. and Scott, D: Hand Book of Aluminium, Volume 1&2, USA, Marcel Dekkar Inc., 2003.