Numerical Analysis of Heat Transfer and Fluid Flow in Keyhole Plasma Arc Welding

2011 ◽  
Vol 60 (8) ◽  
pp. 685-698 ◽  
Author(s):  
Tao Zhang ◽  
Chuan Song Wu ◽  
Yanhui Feng
Keyword(s):  
Heat Transfer ◽  
Fluid Flow ◽  
Numerical Analysis ◽  
Arc Welding ◽  
Plasma Arc Welding ◽  
Plasma Arc

Experimental investigation and numerical simulation of weld bead geometry and temperature distribution during plasma arc welding of thin Ti-6Al-4V sheets

2016 ◽  
Vol 52 (1) ◽  
pp. 30-44 ◽  
Author(s):  
V Dhinakaran ◽  
N Siva Shanmugam ◽  
K Sankaranarayanasamy
Keyword(s):  
Heat Transfer ◽  
Temperature Distribution ◽  
Arc Welding ◽  
Convective Heat Transfer Coefficient ◽  
Weld Bead ◽  
Heat Transfer Analysis ◽  
Bead Geometry ◽  
Plasma Arc Welding ◽  
Plasma Arc ◽  
Weld Bead Geometry

Numerical and experimental investigations of autogenous plasma arc welding of thin titanium alloy of 2 mm thick and modelling the temperature distribution for predicting the weld bead geometry are presented. The finite element code COMSOL Multiphysics is employed to perform non-linear unsteady heat transfer analysis using parabolic Gaussian heat source. Temperature-dependent material properties such as thermal conductivity, density and specific heat are used to enhance the efficiency of simulation process. A forced convective heat transfer coefficient was used to account for the effect of convection. The experimental trials were conducted by varying the welding speed and current using Fronius plasma arc welding equipment. The simulation results are in good agreement with the experimental results.

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