Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
Determination of heating and cooling rates of heat affected zone (HAZ) in laser welding processes
Submission Author:
Ariel Flores Monteiro de Oliveira , SP
Co-Authors:
Ariel Flores Monteiro de Oliveira, Elisan dos Santos Magalhães, Luiz Eduardo dos Santos Paes, Milton Pereira
Presenter: Ariel Flores Monteiro de Oliveira
doi://10.26678/ABCM.COBEM2021.COB2021-0085
Abstract
Besides welding technology was originated hundred years ago, it is still widely used in manufacturing industries as an assembly technique. This procedure has evolved over the years with the main changes being in the heat source. For instance, LASER welding technology has been widely used in the industry because of its various advantages such as accuracy, low heat flux, and high production rate. Some aspects of the welded joint including the size of the weld pool, heat affected zone (HAZ), and microstructure are important to determine welding quality. These variables depend on the heat transfer mechanism and temperature distribution involved in the welding. Therefore, it is necessary and important to understand the characteristics and mechanisms of these thermal processes. The work presents a study of the heating and cooling rates associated with the LASER welding process for the heat-affected zone in autogenous welded steel SAE 1020. The results were obtained founded on the tridimensional heat diffusion equation with a moving source, and a phase change model based on the enthalpy function. The equation was solved through the Finite Volume method using an in-house algorithm written in CUDA-C. The numerical software was developed applying SOR-M in the solution of the linear equations since it allows faster processing of data, capable of decreasing up to 30% of processing time and consequently hardware cost compared to estimates made without using the platform. In the modeling, welding parameters such as speed, power, and penetration were obtained based on the experimental procedure adopted. The numerically obtained results were compared with experimental results. Considering that, the use of an efficient model is imperative for a precise estimation that suits practical applications.
Keywords
Temperature estimation, Heating and cooling rates, LASER welding process, CUDA-C
