Estimation the Peak Temperature and Cooling Rates in GMA Welding of AA6061 Plates by Experimentally Validated Numerical Methods

EasyChair Preprint 6691

Abstract

Numerical simulation is a recent emerging trend in the manufacturing industry. In the present investigation, numerical modeling and simulations are carried out to analyze the peak temperatures and the cooling rates for the temperature field in a gas metal arc welding of AA6061 alloy plates of thickness 6mm, using ANSYS 19.0. Experiments are carried out for the temperature field and heat source models formed at the welded joint.  Furthermore, transient thermal simulations are performed for various temperature fields, different heat inputs which are obtained from experimental investigations. Modeling of the sample prepared for experimental investigation is carried out using SOLID EDGE and grid generation by ICEM CFD. This model is subjected to transient thermal simulations to obtain the peak temperature at the welded joint using ANSYS Workbench. The cooling rates are estimated from the simulated results as it is a complex process to estimate experimentally. The model used in the investigation is a Gaussian distributed Double Ellipsoidal heat source model. The numerical simulation and the experimental results for the temperature fields are in good correlation. The results indicate the peak temperature obtained at the weld joint is above the melting point of the base metal, forming a strong joint that increases with the heat input. Higher cooling rates are obtained at high heat inputs due to higher peak temperatures.

Keyphrases: Peak temperature, Transient thermal simulations, cooling rates, temperature field

@booklet{EasyChair:6691,
  author    = {M M Vishwanath and P Harisha and N Lakshamanaswamy},
  title     = {Estimation the Peak Temperature and Cooling Rates in GMA Welding of AA6061 Plates by Experimentally Validated Numerical Methods},
  howpublished = {EasyChair Preprint 6691},
  year      = {EasyChair, 2021}}