Effect of gap clearance on the mechanical properties of weld-brazed lap joints

Cho, Yong Hwan; Khan, M. Shehryar; Midawi, Abdelbaset R.H.; Zhang, Shiping; Goodwin, Frank; Zhou, Y.

doi:10.1016/j.mfglet.2022.11.002

Cited by 14 publications

(2 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As an alternative to conventional welding processes for joining zinc-coated steel sheets, Metal Inert Gas (MIG) brazing employs copper-based ller wires with a lower melting point than the steel wire [8], offering several advantages, including high deposition rates, fast joining speeds, minimal loss of zinc, low distortion, and increasing strength [9]. The combination of MIG welding and conventional brazing in MIG brazing results in minimal thermal impact on the base material, thereby restricting the formation of undesired phases in the joints [10].…”

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of MIG Brazing Modes: Process Stability, Bead Morphology, Microstructure, and Mechanical Properties

Singh,

Arora,

Oliveira

et al. 2024

Preprint

View full text Add to dashboard Cite

This study compares various modes of metal inert gas (MIG) brazing concerning process stability, bead morphology, microstructure, and mechanical properties. The pulsed-MIG process produces joints with flatter and wider bead morphology, indicating better wettability compared to cold metal transfer (CMT) and standard-MIG processes. This difference is due to the higher heat input of the pulsed-MIG process at the same wire feed rate (WFR). Analysis of voltage-current signals, probability distribution curves, and cyclograms reveals that the CMT-MIG process is the most stable and defect-free, while the standard-MIG process becomes less stable with increasing WFR. Joints brazed using the pulsed-MIG process have significantly higher shear-tensile strength compared to the other two modes, primarily due to higher wettability. Three modes of failure—horizontal interface (mode 1), vertical interface and bead (mode 2), and base metal (mode 3)—were observed. Excessive wettability reduces the cross-sectional area, negatively impacting static and dynamic performance, especially in pulsed brazing joints under high load amplitudes. Conversely, the bumpy beads in CMT and standard-MIG processes enhance the cross-sectional area, providing better resistance against failure along the vertical interface and bead. This study offers a comprehensive database and guidance for selecting appropriate brazing methods depending on joint application, considering the limitations of each brazing process.

show abstract

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of MIG Brazing Modes: Process Stability, Bead Morphology, Microstructure, and Mechanical Properties

Singh,

Arora,

Oliveira

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…The automotive industry has a constant requirement to reduce vehicle weight while improving their crashworthiness and safety [1][2][3][4][5][6]. This demand can be met by using tailor-welded blanks (TWBs) [7][8][9][10], which can be used to produce functionally-graded and highly optimized components [11].…”

Section: Introductionmentioning

confidence: 99%

Recent advances in mitigating fusion zone softening during laser welding of Al-Si coated 22MnB5 press-hardened steels

Khan¹

2023

Mater. Res. Express

View full text Add to dashboard Cite

The automotive industry is seeking reduced vehicle weight and improved safety of newer generation vehicles to meet global zero-emission targets. Tailor-welded blanks (TWBs) offer a solution to meet this demand by producing lightweight yet strong components, such as the B-pillar, using laser-welded press-hardened steels. The laser welding of Al-Si coated PHSs causes the coating to be diluted into the melt pool which can cause premature failure due to the presence of a softer ferrite phase in an otherwise martensitic joint. Currently, laser ablation is used to remove the Al-Si layer prior to welding, but other techniques have been proposed which can potentially bypass the need to remove the coating and instead, welding directly through the coating. This study examines the problem of fusion zone (FZ) softening during the laser welding of Al-Si coated 22MnB5 and discusses recently proposed novel solutions that can solve the issue without the prior removal of the Al-Si coating before welding or using expensive filler materials during welding. The paper concludes with several viable recommendations for future work that can be used as potential directions for further research.

show abstract

Recent Advances in the Transformative Non-fusion Weld-Brazing Process Used to Join Thin-Gauge Alloys Used in the Automotive Industry

Khan

Cho

Goodwin³

et al. 2023

The Minerals, Metals &Amp; Materials Series

View full text Add to dashboard Cite

Effect of gap clearance on the mechanical properties of weld-brazed lap joints

Cited by 14 publications

References 18 publications

Comparative Analysis of MIG Brazing Modes: Process Stability, Bead Morphology, Microstructure, and Mechanical Properties

Comparative Analysis of MIG Brazing Modes: Process Stability, Bead Morphology, Microstructure, and Mechanical Properties

Recent advances in mitigating fusion zone softening during laser welding of Al-Si coated 22MnB5 press-hardened steels

Recent Advances in the Transformative Non-fusion Weld-Brazing Process Used to Join Thin-Gauge Alloys Used in the Automotive Industry

Contact Info

Product

Resources

About