Comprehensive Analysis of Laser Peening Forming Effects on 5083 Aluminum Alloy
Abstract
:1. Introduction
2. Materials and Methods
2.1. Experimental Material
2.2. LSP Experiments
2.3. Experimental Study of Laser Peening Forming Process Rules
2.4. Effect of Laser Peening on Surface Quality and Tensile Properties of Aluminum Alloy Materials
2.5. Laser Peening Forming of Aluminum Alloy Plates for S-Shaped Profiles
2.6. Laser Peening Forming of Aluminum Alloys with Different-Shaped Substrates
3. Results and Discussion
3.1. Influence Law and Analysis of Process Parameters
3.1.1. Effect of Laser Peening Path on the Bending Deformation of Aluminum Alloy Plates and Its Analysis
3.1.2. Effect of Different Laser Energies on the Bending Deformation of Aluminum Alloy Plate
3.1.3. Effect of Thickness on Laser Peening Forming of Aluminum Alloy Plates
3.2. Effect of the Number of Laser Shocks on the Surface Quality of Aluminum Alloy Materials
3.2.1. Surface Topography of the Material after Treatment with Different Laser Shock Times
3.2.2. Material Hardness after Different Laser Shock Times
3.2.3. Residual Stresses in Materials after Laser Shock Peening
3.3. Effect of Different Laser Shock Times on the Properties of Aluminum Alloy Materials
3.3.1. Tensile Properties
3.3.2. Fracture Morphology
4. Conclusions
- (1)
- The bending moment perpendicular to the direction of the laser peening path is substantial, with the bending deformation reaching up to 12.5 mm. When the laser peening path is inclined horizontally, the aluminum alloy plate is more susceptible to torsional deformation.
- (2)
- Under laser energy conditions of 5 J, 6 J, and 7 J, the deformations were 3.8 mm, 4.9 mm, and 5.4 mm, respectively. As the laser energy increased, the deformation of the plate also increased, with a maximum deformation of 5.4 mm.
- (3)
- For a 4 mm-thick aluminum alloy plate, convex deformation occurred in the direction of laser incidence, and the deformation magnitude increased with higher laser energy. Compared to the impact of laser energy on bending deformation, the impact path had a more significant effect. In the case of a 2 mm-thick aluminum alloy plate, concave bending deformation was observed relative to the laser incidence direction.
- (4)
- After 0, 1, and 2 laser peenings, the surface morphology fluctuations were 22 µm, 68 µm, and 96 µm, respectively, and the roughness was 0.245 µm, 2.74 µm, and 3.86 µm. The surface hardness of the specimens was 89 HV, 105 HV, and 120 HV, with hardness decreasing along the depth direction. The residual stresses on the sample surfaces were 58 MPa, −80 MPa, and −107 MPa, indicating a change from tensile to compressive stresses, with residual compressive stresses diminishing with depth.
- (5)
- After 0, 1, and 2 laser peenings, the tensile strength increased to 208.5 MPa, 218 MPa, and 236.5 MPa, respectively. The tensile fracture surface exhibited finer and more uniformly distributed dimples, demonstrating enhanced plasticity and strength of the material post-laser peening.
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Specimen | Number of Shocks | Laser Energy (J) | Overlap Ratio (%) | Pulse Width (ns) |
---|---|---|---|---|
1 | 0 | 0 | 0 | 0 |
2 | 1 | 5 | 30 | 16 |
3 | 2 | 5 | 30 | 16 |
Specimen | Tensile Strength/MPa | Maximum Force/KN | Maximum Displacement/mm |
---|---|---|---|
1 | 208.5 | 8.34 | 7.495 |
2 | 218 | 8.75 | 5.207 |
3 | 235.5 | 9.46 | 5.424 |
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Kong, C.; Zhang, X.; Chen, G.; Yuan, X.; Liu, B.; Zhu, R. Comprehensive Analysis of Laser Peening Forming Effects on 5083 Aluminum Alloy. Micromachines 2024, 15, 949. https://doi.org/10.3390/mi15080949
Kong C, Zhang X, Chen G, Yuan X, Liu B, Zhu R. Comprehensive Analysis of Laser Peening Forming Effects on 5083 Aluminum Alloy. Micromachines. 2024; 15(8):949. https://doi.org/10.3390/mi15080949
Chicago/Turabian StyleKong, Chuijiang, Xiaojun Zhang, Gongling Chen, Xiamin Yuan, Bing Liu, and Ran Zhu. 2024. "Comprehensive Analysis of Laser Peening Forming Effects on 5083 Aluminum Alloy" Micromachines 15, no. 8: 949. https://doi.org/10.3390/mi15080949