The Mechanisms of Resistance Spot Welding of Magnesium to Steel

Liu, L.; Xiao, L.; Feng, Jia; Tian, YH; Zhou, Sq Q.; Zhou, Y.

doi:10.1007/s11661-010-0333-0

Cited by 84 publications

(52 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several papers have been published to identify the effect of G and R on the microstructure in the FZ. [31][32][33][34][35][36] To facilitate a better understanding of the effect of G/R and G 9 R on the morphology and size of solidification microstructures, a schematic plot is shown in Figure 5. [37] It is observed that the moderate temperature gradient at the boundary of fusion line resulted in columnar dendrites in both welded joints, whereas in the center of the FZ, dendrites became equiaxed because of a lower temperature gradient.…”

Section: A Microstructurementioning

confidence: 99%

Microstructure and Mechanical Properties of Fiber-Laser-Welded and Diode-Laser-Welded AZ31 Magnesium Alloy

Chowdhury

Chen

Bhole

et al. 2010

Metall Mater Trans A

Self Cite

View full text Add to dashboard Cite

The microstructures, tensile properties, strain hardening, and fatigue strength of fiber-laserwelded (FLW) and diode-laser-welded (DLW) AZ31B-H24 magnesium alloys were studied. Columnar dendrites near the fusion zone (FZ) boundary and equiaxed dendrites at the center of FZ, with divorced eutectic b-Mg 17 Al 12 particles, were observed. The FLW joints had smaller dendrite cell sizes with a narrower FZ than the DLW joints. The heat-affected zone consisted of recrystallized grains. Although the DLW joints fractured at the center of FZ and exhibited lower yield strength (YS), ultimate tensile strength (UTS), and fatigue strength, the FLW joints failed at the fusion boundary and displayed only moderate reduction in the YS, UTS, and fatigue strength with a joint efficiency of~91 pct. After welding, the strain rate sensitivity basically vanished, and the DLW joints exhibited higher strain-hardening capacity. Stage III hardening occurred after yielding in both base metal (BM) and welded samples. Dimple-like ductile fracture characteristics appeared in the BM, whereas some cleavage-like flat facets together with dimples and river marking were observed in the welded samples. Fatigue crack initiated from the specimen surface or near-surface defects, and crack propagation was characterized by the formation of fatigue striations along with secondary cracks.

show abstract

Section: A Microstructurementioning

confidence: 99%

Microstructure and Mechanical Properties of Fiber-Laser-Welded and Diode-Laser-Welded AZ31 Magnesium Alloy

Chowdhury

Chen

Bhole

et al. 2010

Metall Mater Trans A

Self Cite

View full text Add to dashboard Cite

show abstract

“…Results show the good joining strength can be obtained, which reaches 70-80 % of the Mg substrate. Resistance spot welding (RSW) of AZ31B Mg alloy to Zn-coated steel also produced the joint strength as high as 95 % of that of Mg-Mg joint [10]. However, *Corresponding author: tel.…”

Section: Introductionmentioning

confidence: 99%

Research on laser welding-brazing of dissimilar Mg alloy and stainless steel

Ming¹,

MING²,

GENG³

et al. 2021

View full text Add to dashboard Cite

Laser welding-brazing was developed to join dissimilar AZ31B magnesium (Mg) alloy and AISI304 stainless steel using a high power fiber laser. The maximum joint strength was 211 MPa, which reached 89.8 % of Mg base metal. The interface characterization and fracture behavior of the joints were investigated by employing optical microscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction. A transition zone was observed at the interface of fusion zone/steel, where the intermetallic compounds of Mg2Ni and Mg17Al12 were found. The offset from the center of laser beam to the edge of joint seam played a big role in the joining strength by changing the area fraction of reaction layer to whole interface. The smaller the laser offset, the larger the area fraction of reaction layer to whole interface, and thus the stronger the joining strength is. By the characteristics observed on fracture surface, the fracture behavior was summarized.K e y w o r d s : laser brazing, stainless steel, magnesium alloy, interface, tensile strength

show abstract

“…However, due to the very large differences in the physical properties of Mg and steel, and poor interactions, conventional processes have exhibited some disadvantages, such as a large heat-affected zone (HAZ), solidification cracking, porosity, evaporative loss of the alloying elements, and high residual stresses resulting in low welding joint strength [12,13]. After consulting a large volume of literature, the lap joints of Mg-steel obtained by fusion welding methods have maximum shear loads of 5 kN [14] (resistance spot welding) and the minimum value of 767 N (laser welding-brazing) [15].…”

Section: Introductionmentioning

confidence: 99%

The Role of Mechanical Connection during Friction Stir Keyholeless Spot Welding Joints of Dissimilar Materials

Liu

Wang

et al. 2017

Metals

View full text Add to dashboard Cite

Abstract:Contrast experiments of lap joints among dissimilar AZ31B Mg alloy, Mg99.50, zinc-coated DP600 sheet, and non-zinc-coated DP600 sheet were made by friction stir keyholeless spot welding (FSKSW) and vacuum diffusion welding (VDW), respectively. Scanning electron microscopy (SEM) and energy disperse spectroscopy (EDS) were used to investigate the microstructures and components of the joints welded. The experimental results show that the FSKSW bonding method is a kind of compound mode that contains a mechanical connection and element diffusion fusion connection, in which mechanical connection has the main decisive function on joints of Mg/steel. Elements diffusion exists in the interfacial region of the joints and the elements diffusion extent is basically the same to that of VDW. The elements' diffusion in Mg/steel using FSKSW is defined in the reaction between small amounts elements of the base metal and zinc-coated metals. The intermetallic compounds and composite oxide perform some reinforcement on the mechanical connection strength.

show abstract

The Mechanisms of Resistance Spot Welding of Magnesium to Steel

Cited by 84 publications

References 27 publications

Microstructure and Mechanical Properties of Fiber-Laser-Welded and Diode-Laser-Welded AZ31 Magnesium Alloy

Microstructure and Mechanical Properties of Fiber-Laser-Welded and Diode-Laser-Welded AZ31 Magnesium Alloy

Research on laser welding-brazing of dissimilar Mg alloy and stainless steel

The Role of Mechanical Connection during Friction Stir Keyholeless Spot Welding Joints of Dissimilar Materials

Contact Info

Product

Resources

About