Numerical Simulation of Laser Welding Dissimilar Low Carbon and Austenitic Steel Joint

Abstract

<jats:title>Abstract</jats:title><jats:p>Numerical simulation of laser welding dissimilar joint was presented. Results of butt joint for low carbon and austenitic steels are studied. Numerical calculations based on thermo-mechanical method and phase transformation were used for estimating weld dimensions and joint properties. Unconventional welding method where focused photons beam are used as a heat source were presented. Problems with welding of dissimilar joints, where different composition and thermo physical material properties affect on this phenomena complexity are solved using numerical methods and laser welding technology. Simulation of low carbon and stainless steel joints using SimufactWelding software are presented. Model of heat source within geometry and parameters was programmed. Laser beam welding simulation was performed for estimating parameters for complete joints penetration. Programming welding boundary condition and heat source geometry welding parameters with output power and welding speed rate was estimated. Materials used in simulation process and experimental welding was low carbon construction S235JR and stainless 316L steels in sheets form. Joint properties such as fusion zone and heat affected zones dimensions and stress-strain distribution were calculated. Estimation of complete joint characteristics was obtained using thermo-mechanical simulation method and Marc solver engine.. Experimental trial butt joint welding were performed based on estimated parameters. Welding process was performed using 6kW CO<jats:sub>2</jats:sub> laser system. Based on numerical simulation, microstructure analysis, hardness distribution and chemical distribution of fusion zone, properties of obtained joint was studied. Model for simulation of dissimilar laser welding joint was obtained, and properties of obtained joint based on simulation and experiment was studied.</jats:p>

A Review on Fusion Welding of Dissimilar Ferritic / Austenitic Steels: Processing and Weld Metallurgy

“…In recent years LBW has been utilized for joining ferritic / austenitic dissimilar steels and some researchers addressed their efforts in butt-joining thin sheets without filler metals: AISI 1010 to AISI 321 in [36], AISI 1010 to AISI 304L in [37] and 9Cr-1Mo-V-Nb to 316 L(N) in [38], S235JR to AISI 316L in [39]. However, in absence of a filler metal with composition such as to compensate for the absence of alloying elements in carbon steel, dangerous martensitic microstructures were observed in the welds.…”

Ultrasonic and FEM residual stress measurement in dissimilar St37–St52 welding

“…Huang et al 22 S355JR 2 316L dissimilar metal welding SYSWELD Heinze et al 23 S355J2 + N (ASTM A572 Gr.50) SYSWELD Chukkan et al 24 Stainless steel welding SYSWELD Yang 25 Stainless steel welding SYSWELD Gkatzogiannis al. 26 Two multi-phase ferritic steel grades -Launert and Pasternak 27 Conventional steel S355 and high strength steel S690 -Danielewski et al 28 Dissimilar low carbon and austenitic steel joint Simulact Welding software Zhao et al 29 T92/S30432 dissimilar welded pipe -Liu et al 30 Dissimilar welding of 316L and low alloy steel SYSWELD Xie et al 31 DP780 steel thin-plate welded joints using Gas Tungsten Arc (GTA) welding and Ultrasonic-wave-assisted Gas Tungsten Pulsed Arc (U-GTPA) welding…”

Comparative Microstructural, Mechanical and Corrosion Study between Dissimilar ATIG and Conventional TIG Weldments of 316L Stainless Steel and Mild Steel

“…Moreover, in ATIG welding, an irregularity of 3 μm wide was observed at the mild steel border and 5 μm band was also revealed in mild steel neighboring the fusion line of the weld zone, as shown in Figures 12 and 13. On the other hand, the HAZ width in the 316L SS side was wider than that on the MS side owing to the higher thermal conductivity of MS (49 W/m°K at 200 °C) in comparison to that of 316L SS (15 W/m°K at 200 °C) [37]. A weld chemistry composition assessment was carried out using an EDS point scan from the MS side to the 316L side for an MS-316L SS dissimilar TIG weld.…”