Bo Liu, Zhenglong Lei, Heng Zhou, Honghui Wang. Microstructures and Properties of Laser Welded Ti2AlNb-Based Alloy Joints Under Different Heat Treatment States[J]. Laser & Optoelectronics Progress, 2019, 56(10): 101404
- Laser & Optoelectronics Progress
- Vol. 56, Issue 10, 101404 (2019)
Fig. 1. Microstructure of Ti-22Al-27Nb alloy. (a) Metallographic microstructure; (b) SEM image
Fig. 2. Size of tensile specimen. (a) Room temperature; (b) 650 ℃
Fig. 3. Microstructure of laser welded sheet joint under hot rolling
Fig. 4. Microstructure of heat affected zone of laser welded sheet joint under hot rolling. (a) Macrostructure of heat affected zone; (b) zone away from fusion zone (A zone); (c) middle zone (B zone); (d) zone close to fusion zone (C zone)
Fig. 5. Microstructure of HT1 sheet
Fig. 6. Microstructure of heat affected zone of HT1 sheet
Fig. 7. Microstructure of weld of HT1 sheet. (a) Metallographic microstructure; (b) SEM image
Fig. 8. Microstructure of HT2 sheet. (a) Grain boundary; (b) within grains
Fig. 9. Microstructure of heat affected zone of HT2 sheet
Fig. 10. Microstructure of weld of HT2 sheet
Fig. 11. Mechanical properties at room temperature of laser welded sheet joints under different states
Fig. 12. Tensile curves at room temperature of laser welded sheet joints under different states
Fig. 13. Mechanical properties at 650 ℃ of laser welded sheet joints under different states
Fig. 14. Tensile curves at 650 ℃ of laser welded sheet joints under different states
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Table 1. Chemical compositions of Ti-22Al-27Nb alloy(mass fraction, %)
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