Yanwei Chai, Yun Zou, Shuhao Liu, Dong Wang, Yang Li. Characterization of Elastic Modulus of Laser Cladding Coatings Using Laser Ultrasonic Method[J]. Laser & Optoelectronics Progress, 2022, 59(1): 0114014
- Laser & Optoelectronics Progress
- Vol. 59, Issue 1, 0114014 (2022)
Fig. 1. Model of surface wave propagating in a two-layer structure of 45 steel substrate coated with nickel alloy
Fig. 2. Dispersion curves of surface wave on nickel alloy coating with different elastic modulus
Fig. 3. Diagram of laser cladding synchronous powder feeding technology
Fig. 4. Two-layer structure specimen of 45 steel substrate with nickel alloy coating
Fig. 5. Optical microscopy images of nickel alloy coating. (a) Front metallography diagram of the coating; (b) side metallographic diagram of the coating
Fig. 6. Dimensional drawing of tensile samples
Fig. 7. Relationship between stress and strain of tensile test
Fig. 8. Laser ultrasonic testing system
Fig. 9. Schematic of laser ultrasonic signal acquisition region
Fig. 10. Time domain signal diagram and spectrum of the surface at 3 mm distance between the excitation point and the receiving point. (a) Time domain signal diagram; (b) spectrum of the surface
Fig. 11. Dispersion relation of signals collected from region 3 on nickel alloy-coated 45 steel substrate by 2D-FT
Fig. 12. Dispersion curves of different regions by 2D-FT. (a) Dispersion curves of surface wave on regions 1-8 of nickel alloy coating; (b) dispersion curves of surface wave on three regions of 45 steel
Fig. 13. Flowchart for solving the inverse problem of elastic modulus of coating
Fig. 14. Dispersion curve fitting diagram of region 3 of laser cladding coating
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Table 1. Elastic modulus of tensile samples
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Table 2. Elastic modulus of laser cladding coating on different measuring areas
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