Heat Inputs Adjustment Corresponding to the HAZ Cooling Times in GMAW on 2205 Duplex Steel Using Finite Element Simulation

Abstract

In the present paper, an adjustment of the heat inputs corresponding to the cooling times of interest “t_12/8” and “t_8/5” in the HAZ of the GMAW of a duplex stainless steel 2205, of 10 mm thickness, using finite element simulation is made. For simulation, a welding modeling methodology previously developed was used, and it was enriched with the incorporation of a correction factor of the heat transferred to the finite elements by which the heat source passes. The methodology, using a code in APDL language, was initially validated through the comparison with experimental results of thermal cycles. In the paper is also demonstrated that the results of the relation of the heat input and cooling time variables are more accurate when using the Rykalin 2D theoretical model with the average properties of the steel in the range from room to solid temperature, than those obtained when the properties are replaced at room temperature.

Key-words:
Duplex steel; Heat input; GMAW; Welding simulation; Cooling time