Multiphysics Simulation of Laser Cladding Process to Study the Effect of Process Parameters on Clad Geometry

Abstract The present work reports two-dimensional simulation of laser cladding process to understand the influence of process parameters on clad geometry formation for better process optimization. The application deals with pure copper powder cladding of SS316L substrate for process feasibility for thicker coating layers by CO2 laser. For this purpose, first mathematical model is developed and dealt numerically using multi-physics software. Conservation equation of energy, momentum and mass of this process are coupled through the temperature variable and solved to adapt the laser cladding process. The boundary conditions due to the laser melting process of dissimilar materials have to be deal with complex assumptions are applied in mathematical modelling to simplify problem due to the different materials properties. The deformation of free surface is calculated using moving mesh by the way of ALE (Arbitrary Lagrangian and Eulerian) method. In addition, thermo-capillary forces and their effect on fluid flow inside the melt pool are also considered in modelling to complete the process optimization. Thermal and stress distributions due to the process are also evaluated in the developed process simulation. The results provide approximate information about the effect of each selected parameters on clad geometry formation. The influence of process parameters have shown the best choice of optimization.

[1]  Pradip Majumdar,et al.  Finite element analysis of laser irradiated metal heating and melting processes , 2010 .

[2]  Johan Meijer,et al.  FEM modeling and experimental verification for dilution control in laser cladding , 2011 .

[3]  Andrew J. Pinkerton,et al.  Advances in the modeling of laser direct metal deposition , 2015 .

[4]  Suresh Akella,et al.  Welding Process Simulation Model for Temperature and Residual Stress Analysis , 2014 .

[5]  R. Fabbro,et al.  2D axial-symmetric model for fluid flow and heat transfer in the melting and resolidification of a vertical cylinder , 2010 .

[6]  E. Amara,et al.  Numerical modelling of the laser cladding process using a dynamic mesh approach , 2005, Proceedings of CAOL 2005. Second International Conference on Advanced Optoelectronics and Lasers, 2005..

[7]  K. Ioki,et al.  ITER vacuum vessel: Design review and start of procurement process , 2009 .

[8]  Chun-hua Xu,et al.  Temperature and stress fields of multi-track laser cladding , 2009 .

[9]  P. Papanikos,et al.  Numerical simulation of the laser welding process in butt-joint specimens , 2003 .

[10]  Teresa Sibillano,et al.  Thermo-mechanical modeling of laser welding of AA5083 sheets , 2007 .

[11]  Amitava De,et al.  Heat transfer and material flow during laser assisted multi-layer additive manufacturing , 2014 .

[12]  Huan Qi,et al.  Numerical simulation of heat transfer and fluid flow in coaxial laser cladding process for direct metal deposition , 2006 .

[13]  M. Walczak,et al.  Multiphysics simulation of laser–material interaction during laser powder depositon , 2012 .