Xinlong Liao, Boyong Su, Shuo Xu, Guoran Hua, Heng Wang, Yupeng Cao. Flow Law of Plastic Deformation of TC4 Titanium Alloy by Laser Shock Peening[J]. Chinese Journal of Lasers, 2023, 50(16): 1602206
- Chinese Journal of Lasers
- Vol. 50, Issue 16, 1602206 (2023)
Fig. 1. Schematic of LSP treatment
Fig. 2. Three dimensional finite element model after mesh division
Fig. 3. Pressure-time history curves of laser shock wave
Fig. 4. Deformation diagram extracted on center line
Fig. 5. Volume calculation flowchart
Fig. 6. Simulation result of deformation when laser power density is 3.02 GW/cm2. (a) Cloud diagram of deformation; (b) cloud diagram of deformation section; (c) detailed surface deformation distribution
Fig. 7. Simulation results of surface residual stress when laser power density is 3.02 GW/cm2. (a) Cloud diagram of residual stress; (b) detailed distribution of residual stress
Fig. 8. Distributions of surface deformation and surface residual stress under different laser power densities. (a) Surface deformation distribution; (b) surface residual stress distribution
Fig. 9. Laser shock test results. (a) Micro-indention on specimen surface; (b) topography of surface micro-indention; (c) detailed surface profiles; (d) micro-indention depth, convex deformation height, and residual stress versus laser power density
Fig. 10. Surface micro-indention depth versus laser power density
Fig. 11. Detailed deformation distributions at different depths when laser power density is 3.02 GW/cm2
Fig. 12. Fitting curves. (a) Surface micro-indention deformation; (b) internal convex deformation
Fig. 13. Distributions of plastic deformation volume. (a) Trend in volume of each part; (b) proportion of volume of each part
Fig. 14. TEM images of TC4 titanium alloy surface layer before and after LSP. (a) Position at 10 μm below surface before LSP; (b) micro-indention and (c) annular convex deformation areas at 10 μm below surface after LSP; (d) internal convex deformation area at 1 mm below surface after LSP
Fig. 15. Particle size distribution diagrams of TC4 titanium alloy before and after LSP. (a) Position at 10 μm below surface before LSP; (b) micro-indention and (c) annular convex deformation areas at 10 μm below surface after LSP; (d) internal convex deformation area at 1 mm below surface after LSP
Fig. 16. Laser impact surface morphology when spot overlapping rate is 0
Fig. 17. Laser impact surface morphology when spot overlapping rate is 33%
Fig. 18. Laser impact surface morphology when spot overlapping rate is 50%
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Table 1. LSP parameters
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Table 2. Basic material parameters of TC4 titanium alloy
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