Ming Pang, Yixuan Fu. Influence of Laser Scanning Speed on Structure Evolution and Performance of Melted Magnesium Alloy[J]. Laser & Optoelectronics Progress, 2020, 57(15): 151401
- Laser & Optoelectronics Progress
- Vol. 57, Issue 15, 151401 (2020)
Fig. 1. Physical model of laser melting magnesium alloy
Fig. 2. Effect of different laser scanning speeds on the frontal appearance. (a) Frontal appearance; (b) results of frontal inspection
Fig. 3. Cross-sectional morphology of the molten pool. (a) v=40 mm/s; (b) v=50 mm/s; (c) v=60 mm/s
Fig. 4. Matrix structure. (a) Matrix under scanning electron microscope; (b) matrix under light microscope
Fig. 5. Surface structure of the melted zone. (a) v=40 mm/s; (b) v=50 mm/s; (c) v=60 mm/s
Fig. 6. Upper-middle area structure of the melted zone. (a) v=40 mm/s; (b) v=50 mm/s; (c) v=60 mm/s
Fig. 7. Structure at the junction of melted zone and matrix. (a) v=40 mm/s; (b) v=50 mm/s; (c) v=60 mm/s
Fig. 8. Molten pool by energy spectrum line scanning. (a) Schematic diagram of line scanning position; (b) change trend of element proportion
Fig. 9. Mesophase point scanning. (a) Bulky mesophase; (b) needle-like mesophase; (c) massive mesophase
Fig. 10. Effect of laser scanning speeds on hardness of melted layer. (a) v=40 mm/s; (b) v=50 mm/s; (c) v=60 mm/s
Fig. 11. Polarization curves at different scanning speeds
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Table 1. Chemical composition of AZ80D magnesium alloyunit: %
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Table 2. Test parameters
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Table 3. Mass fraction of each element in the mesophaseunit: %
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