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Formability of laser welded steel/magnesium dissimilar metal with Sn powder-adhesive interlayer Cover

Formability of laser welded steel/magnesium dissimilar metal with Sn powder-adhesive interlayer

Materials Science-Poland
Volume 39 (2021): Issue 1 (March 2021)
By: Tao Tao,  Jinshui Liu,  Dianwu Zhou,  Youruiling Yan and  He Zhou  
Open Access
|Jul 2021

Figures & Tables

Fig. 1

Schematic illustration of the steel/magnesium welding.

Fig. 2

Finite element model of welding: (A) Sn powder interlayer (B) Sn-adhesive interlayer.

Fig. 3

Joint morphologies of Sn powder interlayer laser weld: (A) face (B) root; Joint morphologies of Sn-adhesive interlayer laser weld (C) face (D) root.

Fig. 4

NAC high-speed camera at t = 20 ms: (A) Sn powder interlayer (B) Sn-adhesive interlayer; Infrared spectrum (C) Sn powder interlayer (D) Sn-adhesive interlayer.

Fig. 5

Element fitting spectrum of welding with Sn powder and Sn-adhesive interlayer: (A) Sn (B) Fe (C) Mg (D) C.

Fig. 6

Morphology of welded joints: (A) with Sn inter-layer, (B), (C), (D) and (E) Fe, Mg, Sn, and C mapping; (F) with Sn-adhesive inter-layer, (G), (H), (I) and (J) Fe, Mg, Sn, and C mapping.

Fig. 7

Morphology of joints: (A) with Sn-adhesive inter-layer cross-section (B) region a (C) region b (D) region c; (E) with Sn inter-layer cross-section (F) region d (G) region e (H) region f.

Fig. 8

XRD analysis of the weld joints with Sn-adhesive interlayer. XRD, X-ray diffraction.

Fig. 9

P = 1,500 W, V = 40 mm/s laser welding isotherm diagram (A) with Sn powder interlayer (B) with Sn-adhesive interlayer. P = 1,500 W, V = 40 m/s steel magnesium laser welding temperature cloud distribution (C) with Sn powder interlayer (D) with Sn-adhesive interlayer.

EDS spot composition analysis results in Figure 7 (at%)_

RegionsFeSnMg
I––100
II63.2336.35–
III–31.6662.63
IV00.3336.4162.85

Comparison of experimental weld size and simulation results (mm)_

P = 1,500, V = 40 mm/sSteel plate surface melt widthMagnesium plate surface melt widthMagnesium plate melt depth
Sn-adhesive interlayerExperimental0.8491.480.997
Simulation0.931.450.89
Sn powder interlayerExperimental0.8271.381.27
Simulation0.901.361.10

Composition of welding base material (wt%)_

MaterialsAlZnMnSiCSPFeMg
DP5900.02–1.600.04460.0680.0150.011Bal.–
AZ31B3.120.950.150.10–––0.03Bal.

Optimized process parameters used in present work_

ParametersValue
Laser power (W)1,500
Laser defocus (mm)+2
Welding speed (mm/s)40
Flow rate of Ar gas (L/min)15

Electron density of each element in the joints with Sn powder and Sn-adhesive interlayers_

InterlayerFe (1017 cm−3)Sn (1017 cm−3)C (1017 cm−3)Mg (1017 cm−3)
Sn powder6.56634.26960.98260.5347
Sn-adhesive6.32633.42360.60600.8751
DOI: https://doi.org/10.2478/msp-2021-0014 | Journal eISSN: 2083-134X | Journal ISSN: 2083-1331
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Language: English
Page range: 113 - 123
Submitted on: Mar 2, 2021
|
Accepted on: Apr 10, 2021
|
Published on: Jul 9, 2021
Published by: Wroclaw University of Science and Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
dissimilar metal welding,
micro-structure,
numerical simulation,
Sn-adhesive interlayer
Related subjects:
Materials sciences,
Materials sciences, other,
Nanomaterials,
Functional and smart materials,
Materials characterization and properties

© 2021 Tao Tao, Jinshui Liu, Dianwu Zhou, Youruiling Yan, He Zhou, published by Wroclaw University of Science and Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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