Effect of axial magnetic field in the laser beam welding of stainless steel to aluminum alloy

Chen, Rong; Wang, Chunming; Jiang, Ping; Shao, Xinyu; Zhao, Zeyang; Gao, Zhongmei; Chen, Yue

doi:10.1016/j.matdes.2016.07.064

Cited by 72 publications

(17 citation statements)

References 23 publications

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“…Figure 9 shows the tensile force of joints. In Figure 9, Joint I has low tensile force about 2.24 KN, but the tensile force of Joint II was greatly improved, and the value was 2.6 KN, which was close to tensile force of 2.79 KN for Joint III and reached 93% tensile force of steel-steel joint (Joint III) [30,31].…”

Section: Resultsmentioning

confidence: 85%

The Joining Behavior of Titanium and Q235 Steel Joined by Cold Metal Transfer Joining Technology

2019

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Cold metal transfer process is applied to join titanium and Q235 steel with copper filler metal. Scanning electron microscope (SEM), energy dispersive spectrometer (EDS) analysis, micro-hardness tests, and tensile strength test were performed to investigate the joining mechanism and strength of joints. The results show that the stacking order of two base metals affected the joining modes and strength. For top Q235 steel to bottom Ti-TA2 lapped joint, there was no distinct interface reaction layer between the steel base metal and the weld metal; dispersed TiFe2 intermetalics (IMCs) IMCs between the steel base metal and the Ti base metal greatly improved the strength of joint; the tensile force of the joint could reach up to 93% that of steel-steel joint using the same welding parameters. Additionally, the joints were fractured in dimple mode at the steel base metal. For top Ti-TA2 to bottom Q235 steel lapped joint, the increasing volume fraction of Ti-Cu IMCs at the Ti-Cu weld metal interface contributed to the strength of joint degradation. The joints under tensile loading are initiated at the Ti-Cu weld metal interface between the weld metal and Ti base metal, then propagated to weld metal, finally fractured with brittle mode.

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Section: Resultsmentioning

confidence: 85%

The Joining Behavior of Titanium and Q235 Steel Joined by Cold Metal Transfer Joining Technology

2019

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“…In laser welding, the welding process will be affected when the magnetic field threshold exceeds 200 mT. Chen et al [17] has investigated the influence of 240 mT magnetic field for the laser welding of dissimilar materials. It is reported that the 240 mT magnetic field is a benefit for the weld bead appearance and weld microstructure for the welding of the dissimilar materials.…”

Section: Introductionmentioning

confidence: 99%

Effect of transverse magnetic field on arc characteristics and droplet transfer during laser-MIG hybrid welding of Ti-6Al-4 V

Chen

Yin

Huang

2021

Int J Adv Manuf Technol

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In this study, the effect of the transverse magnetic field on the arc characteristics and droplet transfer behavior is investigated during Laser-MIG hybrid welding of Ti-6Al-4V. Especially, transverse magnetic fields with 0 mT, 8 mT, 16 mT, 24 mT, and 32 mT are studied. Results indicate that an appropriate magnetic field can increase the stability of arc characteristics, improve the droplet detachment efficiency, and reduce the welding defects such as incomplete fusion and undercut. By applying 24 mT transverse magnetic field, the maximum arc area can decrease by 48.7% with its variance changing from 2.81 mm 2 to 1.06 mm 2 , indicating that an appropriate transverse magnetic field can shrink the arc and improve its stability. The reason of arc shrinkage is that the electric streamline in the arc rotates away from the laser side to the droplet side due to the influence of external magnetic field. On the other hand, the droplet transfer process become more uniform under the appropriate magnetic field. This phenomenon is mainly attributed to the change of Lorentz force direction during droplet rotation, which resultantly increases effective detachment energy. This phenomenon leads to the reduction of the contact time between droplet and molten pool. The droplet transfer form changes from short-circuit transfer to meso-spray transfer under 24 mT magnetic field because of the reduction of the contact time. Therefore, the incomplete fusion and undercut disappears. At last, the appropriated magnetic field parameters during the laser-MIG parameters (2 kW, 160 A, 2 m/min) is concluded as B =24 mT.

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“…Another approach was to retain the steel in solid state while aluminum was melted during the welding process. Recent advances in laser technologies enabled such new techniques for welding aluminum alloys to steels using an external magnetic field in laser welding or adding powders at the interface [13,14]. During laser welding using the conductive mode, the steel plate is maintained in its solid state in order to minimize the reaction with the molten Al alloy.…”

Section: Introductionmentioning

confidence: 99%

A new physical simulation tool to predict the interface of dissimilar aluminum to steel welds performed by friction melt bonding

Sapanathan

Jimenez-Mena

Sabirov

et al. 2019

Journal of Materials Science & Technology

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Optimization of the intermetallic layer thickness and the suppression of interfacial defects are key elements to improve the load bearing capacity of dissimilar joints. However, till date we do not have a systematic tool to investigate the dissimilar joints and the intermetallic properties produced by a welding condition. Friction Melt Bonding (FMB) is a recently developed technique for joining dissimilar metals that also does not exempt to these challenges. The FMB of DP980 and Al6061-T6 is investigated using a new physical simulation tool, based on Gleeble thermo-mechanical simulator, to understand the effect of individual parameter on the intermetallic formation. The proposed method demonstrates its capability in reproducing the intermetallic characteristics, including the thickness of intermetallic bonding layer, the morphology and texture of its constituents (Fe2Al5 and Fe4Al13), as well as their nanohardness and reduced modulus. The advantages of physical simulation tool can enable novel developing routes for the development of dissimilar metal joining processes and facilitate to reach the requiring load bearing capacity of the joints.

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Effect of axial magnetic field in the laser beam welding of stainless steel to aluminum alloy

Cited by 72 publications

References 23 publications

The Joining Behavior of Titanium and Q235 Steel Joined by Cold Metal Transfer Joining Technology

The Joining Behavior of Titanium and Q235 Steel Joined by Cold Metal Transfer Joining Technology

Effect of transverse magnetic field on arc characteristics and droplet transfer during laser-MIG hybrid welding of Ti-6Al-4 V

A new physical simulation tool to predict the interface of dissimilar aluminum to steel welds performed by friction melt bonding

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