Influence of polarity on mechanical properties of dissimilar resistance spot welds of DP 600/AISI 304 steels

Hernández, Alejandro Espinel; Roca, Ángel Sánchez; Fals, Hipólito Carvajal; Ferraresi, Valtair Antonio; Vilarinho, Louriel Oliveira

doi:10.1080/13621718.2016.1149913

Cited by 11 publications

(8 citation statements)

References 19 publications

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“…The selection of the polarity to obtain the dissimilar welded joint was made considering the results of a previous research [13]. This study showed that polarity (+)DP600/(-)AISI304 presented the best mechanical properties and the highest load capacity, 33% higher than those obtained with polarity (-)DP600/(+)AISI304.…”

Section: Resistance Spot Welding Process (Rsw)mentioning

confidence: 96%

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Influence of zinc coating on nugget development and mechanical properties in dissimilar welded joints DP600 – AISI304 obtained by the RSW process

Hernández

Orozco²,

Roca³

et al. 2022

DYNA

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This paper researches the influence of zinc coating of galvanized DP600 steel (DP600G) on the nugget development and mechanical properties of dissimilar DP600 - AISI304 welded joints obtained by resistance spot welding process (RSW). The RSW evaluations consisted of determining, from the dynamic resistance curves, the different stages involved in nugget formation. The experimental results showed that the zinc coating on the DP600G steel has a significant influence on the time needed for the start of the nugget formation, two times higher than that used for non-galvanized steel. The expulsion time was delayed by 1.12 times. The presence of Zn in the DP600G/AISI304 welded joints produced smaller nugget diameters compared to the DP600/AISI304 joints for the same experimental conditions, however higher peak failure load values were obtained for the first. The causes of this unusual behavior are also analyzed in this paper.

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Section: Resistance Spot Welding Process (Rsw)mentioning

confidence: 96%

“…There are few studies on DP600 -AISI304 dissimilar welding. Espinel et al [13], studied the influence of polarity during RSW of dissimilar DP600 steel and AISI 304 stainless steel. The authors concluded that the positions of the sheets (+)DP600/(-)AISI304 and (+)AISI304/(-)DP600), i.e.…”

Section: Dual-phase (Dp) Steel Is One Of the Most Widely Usedmentioning

confidence: 99%

Influence of zinc coating on nugget development and mechanical properties in dissimilar welded joints DP600 – AISI304 obtained by the RSW process

Hernández

Orozco²,

Roca³

et al. 2022

DYNA

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“…Mid-frequency direct current technology applies single-pulse welding with constant current regulation. It helps to improve the welding quality [6][7][8]. In addition, mid-frequency direct current technology contributes positive influence on the mechanical properties and has improved the strength capability of resistance spot welding aluminum joints [8].…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties and corrosion behavior of similar/dissimilar resistance spot welded automotive aluminum alloys

Kaya,

Başer,

Kahraman

2023

Materialwissenschaft Werkst

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Recently, usage of high strength aluminum alloys in automotive applications increase. The reasons for that increase are the light‐weight, high strength, good formability, weldability and corrosion resistance of the aluminum alloys to improve fuel economy as well as decreasing carbon dioxide emission. Automotive hybrid structures are commonly manufactured using dissimilar AA5000‐AA6000 joints to improve mechanical requirements and corrosion resistance of the parts. In this study, AA5754 H111‐AA6063 T4 materials were joined both similarly and dissimilarly by resistance spot welding method. Within the study, a mid‐frequency direct current technology was used instead of conventional alternative current technology. The welded zone was investigated by micro hardness measurements and microstructural characterization. Tensile‐shear and cross‐tension tests were performed. The welded zone of all welded specimens was subjected to salt spray corrosion test. A nugget pull‐out fracture mode was observed on the fracture surface of the all welded joints after tensile‐shear and cross‐tension tests. The lowest hardness values were measured from the weld metals for all welded joints. Porosity and inclusion were observed in the weld nugget with minor cracks in heat affected zone by optical microscope investigations.

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“…It was found that the proposed lower electrode had some advantages in welding the three-sheet welding compared with conventional electrodes or hollow electrodes. Hernández et al [10] assessed the influence of polarity during resistance spot weld of dissimilar lap joints between DP 600 dual-phase steel and AISI 304 stainless steel on mechanical properties and failure modes. Jaber et al [11] investigated the microstructure, failure mode transition, peak load, and energy absorption of spot welded DP600 dual-phase steel during the tensile-shear test.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Experimental Research on Resistance Spot Welded Joints for Dual-Phase Steel

et al. 2019

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Dual-phase steel has been employed in the automotive industry as it has the advantages of high strength, satisfying ductility, low yield ratio, and so on. A novel framework for the weld nugget size prediction and control using finite element modeling and experimental research was proposed in this paper. The two-dimensional axisymmetric numerical analysis model was established and the phase transition on thermal expansion coefficient was taken into account. The whole welding process was simulated and discussed using thermal elastic-plastic theory. To validate the predictive methods of developed weld nugget size and confirmation experiments were implemented with the same input parameters in the ranges of process parameters. The simulated weld nugget sizes were in good agreement with the experimental results except for extreme welding conditions. The microstructure of the welding zone was also investigated based on metallographic experiments and temperature field analysis. The welding parameters were adjusted using the model proposed in this paper so as to obtain the nugget size with pull out failure mode.

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Influence of polarity on mechanical properties of dissimilar resistance spot welds of DP 600/AISI 304 steels

Cited by 11 publications

References 19 publications

Influence of zinc coating on nugget development and mechanical properties in dissimilar welded joints DP600 – AISI304 obtained by the RSW process

Influence of zinc coating on nugget development and mechanical properties in dissimilar welded joints DP600 – AISI304 obtained by the RSW process

Mechanical properties and corrosion behavior of similar/dissimilar resistance spot welded automotive aluminum alloys

Modeling and Experimental Research on Resistance Spot Welded Joints for Dual-Phase Steel

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