Formability of tailor welded blanks of high strength steel: A review

Kumar, Arvind; Gautam, Vijay

doi:10.1016/j.matpr.2021.04.016

Cited by 9 publications

(7 citation statements)

References 40 publications

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“…In the last decades, automotive manufacturers are facing the very hard challenge to design more and more comfortable and safe cars preserving the vehicle overall weight [1,2]. Weight reduction is the key factor for the decrease in fuel consumption which is fundamental for all kinds of vehicles, both with internal combustion engines and with electric ones.…”

Section: Introductionmentioning

confidence: 99%

Laser welding of tailored blanks made of Al-Si-coated 22MnB5 steel using a filler wire and a variable energy distribution laser optics

Coviello

Heydt²,

Rullo³

et al. 2023

Int J Adv Manuf Technol

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Laser welding of Al-Si-coated steels for hot stamping in automotive applications is problematic due to the mixing of the coating layers inside the molten pool that weakens the resulting weld seam. In this case, the most common welding procedure to overcome this issue consists in removing the Al-Si layer through laser ablation prior to the joining. This method continues to be the most widely used by major producers of tailor welded blanks, although in situ ablation of the Al-Si coating can be costly and time consuming. In this work, a novel approach consisting in joining as-received (i.e., not decoated) materials using a filler wire and an innovative variable energy distribution laser optics is introduced and tested on tailor welded blanks made of 22MnB5. Tensile tests of specimens obtained from a 33 full factorial design of experiment have shown an average value of ultimate tensile strength of 1523 MPa, which is much higher than the one usually observed in as-received welded then hot-stamped conditions and aligned with hot-stamped base material values. Hardness test results (494–543 HV0.5) were in the typical hot-stamped base material range of values as well, while SEM–EDS analyses detected no ferrite inclusions inside the fusion zone. Variations of the main process parameters have been considered on an iso-thickness and iso-material configuration, empirically demonstrating the stability and reliability of the proposed methodology as well as its suitability for production purposes.

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Section: Introductionmentioning

confidence: 99%

Laser welding of tailored blanks made of Al-Si-coated 22MnB5 steel using a filler wire and a variable energy distribution laser optics

Coviello

Heydt²,

Rullo³

et al. 2023

Int J Adv Manuf Technol

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“…When selecting an appropriate combination of materials for the body deformation structure components, designers need information on their resistance to deformation under compressive or bending forces ( Figure 1 ) and information on their processability (formability, weldability, etc. )— Figure 1 [ 4 , 18 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Analysis of Stress–Strain Characteristics in DP 600 and TRIP 400/700 Steel Sheets

Evin,

Tomáš,

Németh

2023

Materials

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The body constitutes the largest proportion of the total vehicle weight. Recently, increasing efforts have been made towards reducing its weight and improving its crashworthiness. By reducing its weight, fuel consumption will be reduced, and this will also translate into lower CO2 emissions. In terms of safety, vehicle body components use high strength steel which can absorb a substantial amount of impact energy. The present study pays attention to DP 600 and TRIP 400/700 stress–strain characteristics at quasi-static strain rates. The stress–strain characteristics of absorption capacity, stiffness, and deformation resistance force were investigated experimentally by tensile tests, three-point bending tests, and numerical simulations. The results indicate the potential for increasing the absorption capacity, stiffness, and deformation resistance force of the vehicle body’s deformable steel components. The present study verified the possibility of replacing physical testing with numerical simulation. A reasonably satisfactory agreement between the experimentally determined stress–strain characteristics and the numerical simulation was achieved, which can reduce the development time of deformable vehicle body components, reduce costs and optimize the selection of materials. The results extend the state of knowledge on the deformation characteristics of high-strength materials and contribute to the optimization of body components in terms of passive safety and weight.

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“…This way, the evident benefits of combining different material thicknesses, different grades, or protective coating were available. Joining different metal sheets is often used in the car industry because it reduces manufacturing costs, improves the resistance of new structures, and decreases total weight [3].…”

Section: Introductionmentioning

confidence: 99%

“…often used in the car industry because it reduces manufacturing costs, improves the resistance of new structures, and decreases total weight [3].…”

Section: Introductionmentioning

confidence: 99%

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Structural and Behaviour Optimization of Tubular Structures Made of Tailor Welded Blanks by Applying Taguchi and Genetic Algorithms Methods

Ciubotariu

Radu²,

Herghelegiu³

et al. 2022

Applied Sciences

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Even though they initially appeared as a method of using waste from other production processes, tailored welded blanks (TWB) presented several advantages by combining materials with different characteristics. On the one hand, this study focuses on minimizing the adverse effects caused by the springback of TWB parts. The proposed method is based on the Taguchi technique using orthogonal type 23 networks. On the other hand, genetic algorithms were applied to obtain maximum performance parameters within the dynamic loadings of tubular structures made of TWB by advantageous positioning of the weld line. The obtained data were compared and evaluated through software platforms such as MATLAB, Design Expert, and Dynaform, and experimental validation. By generating an objective function, the construction of thin-walled tubular structures can be controlled for a predetermined deformation and maximum energy absorption. The data obtained has an error rate of less than 3%, thus considering that this method can be used successfully in the qualitative and quantitative estimation of dynamically loaded TWB tubular structures.

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Formability of tailor welded blanks of high strength steel: A review

Cited by 9 publications

References 40 publications

Laser welding of tailored blanks made of Al-Si-coated 22MnB5 steel using a filler wire and a variable energy distribution laser optics

Laser welding of tailored blanks made of Al-Si-coated 22MnB5 steel using a filler wire and a variable energy distribution laser optics

Numerical and Experimental Analysis of Stress–Strain Characteristics in DP 600 and TRIP 400/700 Steel Sheets

Structural and Behaviour Optimization of Tubular Structures Made of Tailor Welded Blanks by Applying Taguchi and Genetic Algorithms Methods

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