Microstructure and failure behavior of dissimilar resistance spot welds between low carbon galvanized and austenitic stainless steels

Marashi, Pirooz; Pouranvari, M.; Amirabdollahian, Sasan; Abedi, Amir Reza; Goodarzi, M.

doi:10.1016/j.msea.2007.07.007

Cited by 180 publications

(107 citation statements)

References 4 publications

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“…In order to weld and study the relation between failure mode and weld fusion zone, austenitic stainless steel and galvanized low carbon steel they have used resistance spot welding. The result of the of the welding work by Marashi et al [12] concludes that the strength of spot weld in the pull-out failure mode is organized by the strength and fusion zone size of the galvanized steel side. Saeid et al [13] focused on the effect of the welding speed on the microstructure and mechanical properties of the stir zone (SZ) in friction stir welding (FSW) of SAF 2205 duplex stainless steel.…”

Section: Introductionmentioning

confidence: 99%

Microstructure Analysis of Arc Welded Mild Steel Plates

Khamari

Sahu

Biswal

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. In order to perform arc welding, mild steel plates of variable thickness i.e. 5 mm, 6 mm and 8mm has been chosen as parent material. Total nine numbers of experiments were conducted by considering the two factors and three levels of design according to Taguchi method. The welding current and material thickness has been selected as variable input parameters with 5mm, 6 mm, 8mm level of material thickness and 90 A, 100A, 110A level of current respectively. The microstructure of the all the nine welded material has been analysed with the help of an optical microscope which is interfaced computer. The results of microstructure obtained from the microscopic investigation have been shown. The effect of current and material on the weldment microstructure is investigated. The result also shows that the coarse structure is formed in fusion zone and fine structure is formed in Heat affected region.

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Section: Introductionmentioning

confidence: 99%

Microstructure Analysis of Arc Welded Mild Steel Plates

Khamari

Sahu

Biswal

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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“…At the present time, RSW is the most used joining method in new generation vehicles. In addition, RSW is suitable for automation and is a fabrication method in automobile manufacturing [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Effect of Welding Current on Tensile-Peel Loading of Welding Joints in TRIP 800 and Micro-Alloyed Steels in Resistance Spot Welding

2017

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In this paper, an analysis of electric resistance spot welding between micro-alloyed steel sheets having 1 mm thickness and TRIP 800 (transformation induced plasticity) steel sheets having 1.5 mm thickness was made. Couples of steel sheets are used in automobile industry. Steel pairs were joined by using resistance spot welding as overlap joint. A timer and current controlled resistance spot welding machine had pneumatic application mechanism and 120 kVA capacity. Preparation of specimens by spot welding was performed using different cycles ranging from 5 to 30 cycle and welding currents ranging from 8.5 to 16.5 kA by rise of 0.5 kA. The electrode force was kept constant at 6 kN. The prepared welding specimens were exposed to tensile-peel tests and the obtained results were supported by diagrams. Finally, appropriate welding parameters were advised to the users.

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“…In the cross-nugget failure mode, failure occurs via crack propagation through the nugget fusion zone (FZ), while in complete button pull-out mode, the failure occurs via complete nugget withdrawal from one sheet. Welds that fail in complete button pull-out mode provide higher peak loads and energy absorption levels than those which fail in cross-nugget failure mode, thus process parameters should be adjusted so that pull-out failure mode is guaranteed [12,13].…”

Section: Introductionmentioning

confidence: 99%

Effect of Process Parameters on the Mechanical Properties and Failure Behavior of Spot Welded Low Carbon Steel

et al. 2015

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In this research, the effect of spot welding parameters on weld quality was investigated. The main affecting welding parameters such as weld current, weld time, electrode force and holding time were determined as the basis for quality evaluation. The selected quality features were classified into mechanical properties and failure behavior, which were required for application with highly dynamic loading. The peak load as one of the important mechanical properties, as well as the two distinct failure modes which were cross-nugget and complete button pull, were observed using tensile-shear stress. To obtain detailed shear stress testing results and to determine the significance of parameters, a servo-hydraulic testing machine was run at a constant cross-head speed of 2mm/min followed by statistical analysis methods, which were Taguchi's L 16 orthogonal array and Analysis of Variance (ANOVA). Furthermore, the failure mode was to be observed based on the fracture surface used as reference for acceptance or rejection of the weld joint. Based on the results, the weld current was the significant factor affecting shear stress and the complete button pull was mostly found, which leads to the satisfactory condition of the joint. Cross-nugget and full button pull-out were the dominant failures observed in the lap-shear test. The cross-nugget failure leads to a low shear load, while complete button pull-out displays maximum shear load.

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Microstructure and failure behavior of dissimilar resistance spot welds between low carbon galvanized and austenitic stainless steels

Cited by 180 publications

References 4 publications

Microstructure Analysis of Arc Welded Mild Steel Plates

Microstructure Analysis of Arc Welded Mild Steel Plates

Effect of Welding Current on Tensile-Peel Loading of Welding Joints in TRIP 800 and Micro-Alloyed Steels in Resistance Spot Welding

Effect of Process Parameters on the Mechanical Properties and Failure Behavior of Spot Welded Low Carbon Steel

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