Finite Element Modeling of TIG Welding of Aisi 304l Stainless Steel and Experimental Validation

Abstract:

In this research work, thermo-elasto-plastic analysis using finite element modeling (FEM) was carried out to study the thermo mechanical behavior of AISI 304L stainless steel plate of 3 mm thick during the autogenous tungsten inert gas welding. Sysweld software has been employed for simulating the temperature distribution, residual stresses and distortion. Physical and mechanical properties of 304 L stainless steel required for simulation were obtained from the literature. Bead-on-plate experiment was carried out at 140 A and 120 mm/min for obtaining weld bead dimensions which are required for heat source fitting in the simulation. Heat source parameters in the simulation were frozen when the bead profile obtained in the simulation matched with the actual bead profile. Then thermal cycles were simulated with the frozen heat source parameters. The thermal cycles and the peak temperatures predicted by the model were compared with that of the experimentally measured values. There was good agreement between the predicted and measured values. The experimentally validated thermal model was further used for simulating residual stresses and distortion. The calculated residual stress profile was validated using experimentally measured residual stress profiles using an Ultrasonic technique. There was good agreement between the predicted and measured residual stress profiles. The simulated distortion values were compared with measured distortion values using height gauge. There was good agreement between the simulated and measured distortion values. The Finite Element model developed for simulating the TIG welding of 304 L stainless steel predicted the thermal cycles, residual stresses and distortion with minimum error.

• Periodical: Applied Mechanics and Materials (Volumes 592-594)
• Pages: 368-373
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.592-594.368
• Online since: July 2014
• Authors: V.V. Narayanareddy*, M. Vasudevan, S. Muthukumaran, K.C. Ganesh, N. Chandrasekhar, P. Vasantaraja
• Keywords: 304L Stainless Steel, Distortion, Finite Element Method (FEM), GTAW, Residual Stress, Thermal Cycle

References

[1] Anca ,A. Cardona , Risso, Fachintti V.D. Finite element modelling of welding process. Applied Mathematical Modelling 2011, 35, 688-707.

DOI: 10.1016/j.apm.2010.07.026

[2] Edwin raja Dhas, Kumanan S Modeling of residual Stress in butt welding . Material and manufacturing processes 2011, 26, 942-947.

DOI: 10.1080/10426914.2011.560232

[3] P. Duranton J. Devauxa, V. Robin P. Gilles, J.M. Bergheau3D modeling of multi pass welding of a 316L stainless steel pipe Journal of Materials Processing Technology 153–154 (2004) 457–463.

DOI: 10.1016/j.jmatprotec.2004.04.128

[4] Shaodong Wang , John Goldak , Jianguo Zhou , Stanislav Tchernov , Dan Downey Simulationon the thermal cycle of a welding process by space–time convection–diffusion finite element analysis International Journal of Thermal Sciences 48 (2009).

DOI: 10.1016/j.ijthermalsci.2008.07.007

[5] Hidekazu Murakawa , Dean Deng , Ninshu Ma, Jiangchao Wang Applications of inherent strain and interface element to simulation of welding deformation in thin plate structures Computational Materials Science 51 (2011) 43–52.

DOI: 10.1016/j.commatsci.2011.06.040

[6] H. Long, D. Gery , A. Carlier , P.G. Maropoulos Prediction of welding distortion in butt joint of thin plates Materials and Design 30 (2009) 4126–4135.

DOI: 10.1016/j.matdes.2009.05.004

[7] Dean Deng , Hidekazu Murakawa Influence of transformation induced plasticity on simulated results of welding residual stress in low temperature transformation steel Computational Materials Science 78 (2013) 55–62.

DOI: 10.1016/j.commatsci.2013.05.023

[8] Liam Gannon Yi Liu , Neil Pegg , Malcolm Smith Effect of welding sequence on residual stress and distortion in flat-bar stiffened plates Marine Structures 23 (2010) 385–404.

DOI: 10.1016/j.marstruc.2010.05.002

[9] J.J. del Coz Díaz , P. Menéndez Rodríguez , P.J. García Nieto , D. Castro-Fresno Comparative analysis of TIG welding distortions between austenitic and duplex stainless steels by FEM Applied Thermal Engineering 30 (2010) 2448e2459.

DOI: 10.1016/j.applthermaleng.2010.06.016

[10] Olivier Asserin , Alexandre Loredo , Matthieu Petelet , Bertrand Iooss Global sensitivity analysis in welding simulations—What are the material data you really need? Finite Elements in Analysis and Design 47 (2011) 1004–1016.

DOI: 10.1016/j.finel.2011.03.016

[11] M.J. Attarha, I. Sattari-Far Study on welding temperature distribution in thin welded plates through experimental measurements and finite element simulation Journal of Materials Processing Technology 211 (2011) 688–694.

DOI: 10.1016/j.jmatprotec.2010.12.003

[12] C. Liu, J.X. Zhang, C.B. Xue Numerical investigation on residual stress distribution and evolution during multipass narrow gap welding of thick walled stainless steel pipes . Fusion Engineering and design 86(2011)288-295.

DOI: 10.1016/j.fusengdes.2011.01.116

[13] N. T. Nguyen, A. Ohta, K. Matsuoka, N. Suzuki, Y. Maeda, 1999, Analytical Solutions for transient temperature of semi-infinite body subjected to 3-D moving heat sources, Welding Journal, pp. 265s-274s.