Improvements of hybrid laser arc welding for shipbuilding T-joints with 2F position of 8 mm thick steel

Churiaque, Cristina; Sánchez-Amaya, J.M.; Üstündağ, Ömer; Porrúa-Lara, Manuel; Gumenyuk, Andrey; Rethmeier, Michael

doi:10.1016/j.optlastec.2021.107284

Cited by 14 publications

(3 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As shown in Figure 5b, by simulating the temperature and stress fields of NV E690 Steel, Sun et al [46] found that the residual stress near the fusion zone and the heat-affected zone was high and showed tensile stress. As explained, the large grain size in HAZ is the main factor causing the large residual stress; as shown in Figure 5c, Churiaque et al [76] optimized the parameters of fillet welds of 8 mm-thick EH36 steel plate using a numerical simulation, and showed that the large grain size in HAZ is the main factor causing the larger residual stress. Finally, the full penetration welds with displacement disturbance of 1.29 mm for the bottom plate, 1.92 mm for Rib Plate and 380 MPA for maximum residual stress are obtained, the welding speed (2.2 m/min) is 1.76 times higher than that of Valdaytseva et al [77] (1.25 m/min).…”

Section: Granular Bainite + Acicular Ferritementioning

confidence: 98%

A Review of Numerical Simulation of Laser–Arc Hybrid Welding

et al. 2023

View full text Add to dashboard Cite

Laser–arc hybrid welding (LAHW) is known to achieve more stable processes, better mechanical properties, and greater adaptability through the synergy of a laser and an arc. Numerical simulations play a crucial role in deepening our understanding of this interaction mechanism. In this paper, we review the current work on numerical simulations of LAHW, including heat source selection laws, temperature field, flow field, and stress field results. We also discuss the influence of laser–arc interaction on weld defects and mechanical properties and provide suggestions for the development of numerical simulations of LAHW.

show abstract

Section: Granular Bainite + Acicular Ferritementioning

confidence: 98%

A Review of Numerical Simulation of Laser–Arc Hybrid Welding

et al. 2023

View full text Add to dashboard Cite

show abstract

“…In recent years, the application of LHW technology in shipbuilding has been considered [8,9]. Due to its high penetration capability, the thinner plate (t ≤ 15 mm) can be formed in one pass on one side, while the thicker plate (t > 15 mm) can also be formed in multiple passes on one side, and the number of welding layers and the width of heataffected zone (HAZ) are far less than that of SAW.…”

Section: Introductionmentioning

confidence: 99%

Microstructure Evolution of Heat-Affected Zone in Submerged Arc Welding and Laser Hybrid Welding of 690 MPa High Strength Steel and its Relationship with Ductile–Brittle Transition Temperature

Wang

Xie

et al. 2022

Acta Metall. Sin. (Engl. Lett.)

View full text Add to dashboard Cite

The comparative study of submerged arc welding (SAW) and laser hybrid welding (LHW) was carried out for a 690 MPa high strength steel with thickness of 20 mm. Microstructure and ductile-brittle transition temperature (DBTT) evolution in welded zone were elucidated from the aspect of crystallographic structure, particularly, digitization and visualization of 24 variants. The impact toughness of each micro zone in LHW joint is better than that of SAW, in which the DBTT of equivalent fusion line and heat-affected zone (HAZ) can reach − 70 and − 80 °C, while that of SAW is only − 50 °C. LHW technology induces narrowing of the HAZ and refining of the microstructure obtained in weld metal and HAZ. Meanwhile, the austenite grain size and transformation driving force in the coarse grained heat-affected zone (CGHAZ) are reduced and increased, respectively. It makes variant selection mechanism occurring in CGHAZ of LHW dominate by close-packed plane grouping, which promotes lath bainite formation with high density of high angle grain boundary, especially block boundary dominated by V1/V2 pair. While for SAW, the lower transformation driving force inferred from the large amount of retained austenite in CGHAZ induces Bain grouping of variants, and thus triggers the brittle crack propagating straightly in granular bainite, resulting in lower impact toughness and higher DBTT.

show abstract

“…The results showed that mechanical boundary conditions mainly affect the welding deformation and have little influence on the residual stress. The effect of Hybrid Laser Arc Welding (HLAW) factors on the quality of naval steel fillet joints has been investigated by Churiaque et al [6]. The effects of various processing parameters such as laser power, welding speed, wire feed rate and HLAW process configuration have been investigated.…”

Section: Introductionmentioning

confidence: 99%

Rationally-Based Structural Design of Welded Plate Panels

Hammad

Abdel-Nasser

Churiaque

et al. 2021

Metals

View full text Add to dashboard Cite

This study predicts the behavior of welded plate panels (unstiffened plates) with different geometrical properties (slenderness ratio and aspect ratio) in order to address a rational structural design procedure, as these parameters are of great importance from a structural design perspective. Nonlinear finite element analysis has been used to simulate the butt-welding process of plate panels, giving the three-dimensional distribution of distortion and residual stresses induced by welding through the design of a moving heat source. The numerical results are validated with published experimental measurements. The effect of geometrical properties such as slenderness ratio β and aspect ratio a/b on the creation of welding-induced imperfections (distortion and residual stresses) have been investigated in this work. These geometrical properties influence the creation of the welding-induced imperfections, which in turn affect the load-carrying capacity of the plate panels. Three different plate slenderness ratios with three different aspect ratios have been studied. It is concluded that increasing the plate aspect ratio can highly increase the out-of-plane distortion magnitude as well as the compressive residual stress. The plates with high slenderness ratio (thin thicknesses) are highly affected by increasing plate aspect ratio a/b. As the slenderness ratio β increases, the reduction in the ultimate strength due to the existence of welding-induced imperfections highly decreases. Slenderness ratio β can highly affected the ultimate strength of plates with smaller aspect ratio more than plates with higher aspect ratio.

show abstract

Improvements of hybrid laser arc welding for shipbuilding T-joints with 2F position of 8 mm thick steel

Cited by 14 publications

References 20 publications

A Review of Numerical Simulation of Laser–Arc Hybrid Welding

A Review of Numerical Simulation of Laser–Arc Hybrid Welding

Microstructure Evolution of Heat-Affected Zone in Submerged Arc Welding and Laser Hybrid Welding of 690 MPa High Strength Steel and its Relationship with Ductile–Brittle Transition Temperature

Rationally-Based Structural Design of Welded Plate Panels

Contact Info

Product

Resources

About