Chinese Journal of Lasers, Volume. 49, Issue 16, 1602013(2022)
Ultrasonic Vibration Steel/Aluminum Butt Joints by Laser-MIG Hybrid Fusion-Brazing Welding
Figures & Tables(13)
Fig. 1. Ultrasonic-assisted laser-MIG hybrid welding. (a) Schematic of equipment; (b) sectional view of partial assembly；(c) schematic of welding
Fig. 3. Front and back sides (left) and macro-forming (right) of welded joints under different ultrasonic powers. (a1)-(a3) 0 W; (b1)-(b3) 130140 W; (c1)-(c3) 200210 W
Fig. 4. Structures of middle areas of joint welds and welds near fusion line at aluminum side under different ultrasonic powers. (a)(d) 0 W; (b)(e) 130-140 W; (c)(f) 200-210 W
Fig. 5. Microstructures of IMCs at steel/ aluminum interface and EDS line scanning results under different ultrasonic powers. (a)(b) 0 W; (c)(d) 130140 W; (e)(f) 200210 W
Fig. 6. Hardness distributions of welded joints under different ultrasonic powers
Fig. 7. Tensile strengths of joints after removing reinforcement under different ultrasonic powers
Fig. 8. Tensile fracture morphologies of specimens after removing reinforcement under different ultrasonic powers
Table 1. Chemical compositions of base metal and welding wire (mass fraction, %)
View tableTable 1. Chemical compositions of base metal and welding wire (mass fraction, %)
Material Al Fe Si Cr Ni Mg Mn C 304 - Bal ≤0.1 17.020.0 8.010.5 - ≤0.2 ≤0.08 6061-T6 Bal. 0.7 0.40.8 0.100.35 - 1.0 0.15 - ER4043 81.83 - 16.96 - - 1.31 - -
Table 2. Parameters for ultrasonic-assisted laser-MIG hybrid welding
View tableTable 2. Parameters for ultrasonic-assisted laser-MIG hybrid welding
Welding parameter Value Welding current(I)/A 96 Wire feeding speed (v) /(m·min－1) 5 Welding speed(vw) /(mm·s－1) 8 Flow rate of shielding gas Ar (R) /(L·min－1) 25 Ultrasonic power /W 0-220
Table 3. EDS point scanning analysis results at locations AH in Fig. 5
View tableTable 3. EDS point scanning analysis results at locations AH in Fig. 5
Location Atomic fraction of Al /% Atomic fraction of Fe＋Cr＋Ni / % Atomic fraction of Si /% Possible phase A 76.58 17.44 5.98 Al8Fe2Si B 70.34 27.03 2.62 FeAl3 C 78.40 13.86 7.74 Al8Fe2Si D 67.97 25.55 6.48 Al8Fe2Si E 63.00 32.29 4.71 FeAl3 F 83.00 10.81 6.19 Al8Fe2Si G 61.92 27.66 10.43 Al8Fe2Si H 53.27 38.79 7.96 Al8Fe2Si
Table 4. Average hardness of each area of joints under different ultrasonic powers
View tableTable 4. Average hardness of each area of joints under different ultrasonic powers
Area Ultrasonic power of 0 W Ultrasonic power of 130-140 W Ultrasonic power of 200-210 W HAZ 47 49 52 FZ 81 83 91
Table 5. EDS point scanning analysis results at locations 114 in Fig. 8
View tableTable 5. EDS point scanning analysis results at locations 114 in Fig. 8
Location Mass fraction of Al /% Mass fraction of Fe＋Cr＋Ni /% Mass fraction of Si /% Possible phase 1 81.01 11.46 7.53 Al8Fe2Si 2 72.80 22.8 4.39 FeAl3 3 75.09 17.88 7.03 Al8Fe2Si 4 73.26 22.46 4.28 Al8Fe2Si 5 72.82 19.9 7.28 FeAl3 6 71.78 24.98 3.24 Al8Fe2Si 7 66.83 29.56 3.61 Al8Fe2Si 8 74.85 18.44 6.70 Al8Fe2Si 9 73.27 21.66 5.07 FeAl3 10 6.71 92.01 1.28 Steel 11 67.59 26.15 6.26 Al8Fe2Si 12 65.57 25.46 6.96 Al8Fe2Si 13 16.53 82.24 1.24 Steel 14 7.97 90.92 1.11 Steel
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Jiaqi Zhang, Yunqi Liu, Shaoxiong He, Ben Liu, Zongtao Zhu. Ultrasonic Vibration Steel/Aluminum Butt Joints by Laser-MIG Hybrid Fusion-Brazing Welding[J]. Chinese Journal of Lasers, 2022, 49(16): 1602013
Paper Information
Category: laser manufacturing
Received: Nov. 24, 2021
Accepted: Dec. 22, 2021
Published Online: Jul. 28, 2022
The Author Email: Zhu Zongtao (zongtaozhu@163.com)
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