Chinese Journal of Lasers, Volume. 48, Issue 22, 2202016(2021)
Experimental Study on Surface Morphology Changes of Aluminum Alloy Using Laser Cleaning and Optimization of Process Parameters
Figures & Tables(19)
Fig. 3. Surface morphology of 6061 aluminum alloy after laser cleaning with different power. (a) 15 W; (b) 30 W; (c) 45 W; (d) 60 W; (e) 75 W
Fig. 5. Surface roughness of 6061 aluminum alloy after laser cleaning with different power
Fig. 6. Change process of aluminum alloy surface morphology varying with laser power. (a)--(d) Stage 1--stage 4
Fig. 7. Surface morphology of 6061 aluminum alloy after laser cleaning with different scanning speed. (a) 2000 mm/s; (b) 3000 mm/s; (c) 4000 mm/s; (d) 5000 mm/s; (e) 6000 mm/s
Fig. 8. Surface morphology of 6061 aluminum alloy after laser cleaning with different line spacing. (a) 0.02 mm; (b) 0.03 mm; (c) 0.04 mm; (d) 0.05 mm; (e) 0.06 mm
Fig. 9. Surface roughness of 6061 aluminum alloy after laser cleaning with different scanning speed and line spacing. (a) Scanning speed; (b) line spacing
Fig. 10. Change process of surface morphology varying with spot spacing. (a)--(c) Stage 1--stage 3
Fig. 11. Surface morphology of 6061 aluminum alloy when power is 60 W, scanning speed is 4950 mm/s, and line spacing is 0.04 mm
Fig. 12. Relative content of surface elements of 6061 aluminum alloy when power is 60 W, scanning speed is 4950 mm/s, and line spacing is 0.04 mm. (a) Location #1; (b) location #2
Table 1. Mass fraction of each component for 6061 aluminum alloy
View tableTable 1. Mass fraction of each component for 6061 aluminum alloy
Element Cu Mn Mg Zn Cr Ti Si Fe Al Mass fraction /% 0.15--0.4 0.15 0.8--1.2 0.25 0.04--0.35 0.15 0.4--0.8 ≤0.7 Balance
Table 2. Mass fraction of elements in micro-area on surface of aluminum alloy after laser cleaning with different power unit:%
View tableTable 2. Mass fraction of elements in micro-area on surface of aluminum alloy after laser cleaning with different power unit:%
Element 15 W 30 W 45 W 60 W 75 W #1 #2 #1 #2 #1 #2 #1 #2 #1 #2 O 7.28 1.68 0.48 0.60 0.86 0.93 0.78 1.11 2.90 4.10 Mg 4.70 1.95 1.62 1.49 1.52 1.55 1.47 1.67 1.77 3.37 Al 87.80 95.42 97.29 97.39 97.10 97.02 97.19 96.47 94.68 92.53 Si 0.22 0.95 0.62 0.51 0.52 0.50 0.56 0.75 0.65 0.00
Table 3. Mass fraction of elements in micro-area on surface of aluminum alloy after laser cleaning with different scanning speed unit:%
View tableTable 3. Mass fraction of elements in micro-area on surface of aluminum alloy after laser cleaning with different scanning speed unit:%
Element 2000 mm/s 3000 mm/s 4000 mm/s 5000 mm/s 6000 mm/s #1 #2 #1 #2 #1 #2 #1 #2 #1 #2 O 5.61 23.44 0.74 0.57 0.86 0.93 0.00 1.10 0.49 4.60 Mg 3.51 2.48 1.50 4.74 1.52 1.55 0.11 1.55 0.56 4.56 Al 90.54 70.49 97.22 94.35 97.10 97.02 99.89 96.43 98.30 90.14 Si 0.35 3.58 0.53 0.34 0.52 0.50 0.00 0.91 0.65 0.69
Table 4. Mass fraction of elements in micro-area on surface of aluminum alloy after laser cleaning with different line spacing unit:%
View tableTable 4. Mass fraction of elements in micro-area on surface of aluminum alloy after laser cleaning with different line spacing unit:%
Element 0.02 mm 0.03 mm 0.04 mm 0.05 mm 0.06 mm #1 #2 #1 #2 #1 #2 #1 #2 #1 #2 O 3.17 14.45 0.00 0.94 0.86 0.93 0.00 1.05 0.87 7.99 Mg 4.26 4.02 4.15 3.85 1.52 1.55 3.89 4.27 4.24 4.84 Al 92.52 81.08 95.85 95.13 97.10 97.02 96.11 94.59 94.81 86.87 Si 0.06 0.46 0.00 0.08 0.52 0.50 0.00 0.09 0.08 0.30
Table 5. Experimental design and roughness test results of 6061 aluminum alloy using laser cleaning
View tableTable 5. Experimental design and roughness test results of 6061 aluminum alloy using laser cleaning
No. Laser power Scanning speed Line spacing Surface roughness / μm Level Value /W Level Value /(mm·s-1) Level Value /mm 1 -1 30 0 4000 -1 0.03 1.048 2 1 60 -1 3000 0 0.04 1.377 3 1 60 1 5000 0 0.04 1.586 4 0 45 1 5000 1 0.05 1.176 5 0 45 0 4000 0 0.04 1.364 6 1 60 0 4000 -1 0.03 1.296 7 -1 30 0 4000 1 0.05 0.957 8 -1 30 -1 3000 0 0.04 1.063 9 0 45 0 4000 0 0.04 1.338 10 -1 30 1 5000 0 0.04 0.995 11 0 45 0 4000 0 0.04 1.349 12 0 45 -1 3000 -1 0.03 1.024 13 1 60 0 4000 1 0.05 1.480 14 0 45 -1 3000 1 0.05 1.190 15 0 45 1 5000 -1 0.03 1.294
Table 6. Variance analysis of the second-order response surface model of aluminum alloy surface roughness after laser cleaning
View tableTable 6. Variance analysis of the second-order response surface model of aluminum alloy surface roughness after laser cleaning
Source Sum of squares Degree of freedom Mean square F PF Significance Model 0.50 9 0.055 61.33 0.0001 Significant P 0.35 1 0.35 390.88 <0.0001 v 0.020 1 0.020 21.93 0.0054 ly 2.485×10-3 1 2.485×10-3 2.77 0.1571 P×v 0.019 1 0.019 21.35 0.0057 P×ly 0.019 1 0.019 21.05 0.0059 v×ly 0.020 1 0.020 22.45 0.0052 P2 4.631×10-3 1 4.631×10-3 5.16 0.0724 v2 0.013 1 0.013 14.63 0.0123 0.053 1 0.053 58.86 0.0006 Residual 4.491×10-3 5 8.983×10-4 Lack of fit 4.151×10-3 3 1.384×10-3 8.12 0.1116 Not significant Pure error 3.407×10-4 2 1.703×10-4 Sum 0.50 14
Table 7. Optimal laser cleaning process for 6061 aluminum alloy
View tableTable 7. Optimal laser cleaning process for 6061 aluminum alloy
Verification experiment Laser power /W Scanning speed /(mm·s-1) Line spacing /mm Roughness /μm 1 60 4900 0.04 1.584 2 60 4950 0.04 1.592 3 60 5000 0.04 1.580 Theoretical value 60 4950 0.041 1.584
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Yuqiang Li, Lingyu Guo, Ping Jiang, Shaoning Geng, Chunming Wang, Song Gao, Chu Han. Experimental Study on Surface Morphology Changes of Aluminum Alloy Using Laser Cleaning and Optimization of Process Parameters[J]. Chinese Journal of Lasers, 2021, 48(22): 2202016
Paper Information
Category: laser manufacturing
Received: May. 31, 2021
Accepted: Jun. 30, 2021
Published Online: Oct. 28, 2021
The Author Email: Jiang Ping (jiangping@hust.edu.cn)
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