Ming Wang, Yue Han, Dongbo Che, Tingfeng Wang. Analysis of Phase Change and Ablation of Steel Targets Irradiated by Continuous Laser and Composite Laser[J]. Laser & Optoelectronics Progress, 2022, 59(11): 1114003
- Laser & Optoelectronics Progress
- Vol. 59, Issue 11, 1114003 (2022)
Fig. 1. Temperature rise curve of rear surface of 9 mm SUS304 stainless steel target
Fig. 2. Calculated laser absorption curve of steel target
Fig. 3. Geometric modeling and meshing
Fig. 4. Temperature cloud map of 20 mm thick steel plate at 300 s under continuous laser irradiation with spot radius of 5 mm and output power of 3.0 kW
Fig. 5. Variations of maximum temperature of 20 mm thickness steel plate under continuous laser irradiation with different output powers and spot radii.（a）Irradiation surface；（b）back surface
Fig. 6. Phase transformations and ablation responses of 20 mm thick steel target under continuous laser irradiation with irradiation time of 60 s and different spot radii.（a1）-（a3）10 mm spot radius；（b1）-（b3）5 mm spot radius
Fig. 7. Variations of maximum temperature of steel target irradiated by continuous/modulated pulsed laser
Fig. 8. Phase transformations and ablation responses of 20 mm thick steel target under continuous/modulated pulsed laser irradiation with irradiation time of 60 s and different spot radii.（a1）-（a3）10 mm spot radius；（b1）-（b3）5 mm spot radius
Fig. 9. Comparison of phase transformation depth and ablation depth of steel target under continuous laser and composite laser irradiations.（a）Phase transformation depth；（b）ablation depth
Fig. 10. Temperature rise curves of back surface of steel target irradiated by 1.4 kW continuous laser with different spot radii
Fig. 11. Two perforation modes of laser irradiated steel target. (a) Vaporization perforation at high energy density; (b) melting perforation at low energy density
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Table 2. Laser parameters
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Table 3. Experimental scheme
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