The Numerical Simulation and Control of Microstructure in Heat-affected Zone in GMAW

SusaTianqi Wang, Liangyu Li, Xiao Li and Xu Yang

Modern Applied Science, 2009, vol. 3, issue 5, 162

Abstract: The grain size in heat affected zone (HAZ) of welding piece is an important element for evaluating the welding quality. The Monte Carlo (MC) technique, a stochastic simulation method, could be applied to simulate the microstructure in HAZ. A finite element model (FEM) was employed to simulate the GMAW temperature field and the data of the thermal cycle were used to combine with the MC numerically model to calculate the grain size in different welding heat input. Then mathematics model of the grain growth could be worked out by both the kinetic model and the MC model. The dynamic process was simulated by the result of the simulation. The experimental result was used to prove the validity of this method in simulating of microstructure.

Date: 2009
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