Author Affiliations
1School of New Energy and Materials, Southwest Petroleum University, Chengdu 610500, Sichuan, China2National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials, South China University of Technology, Guangzhou 510640, Guangdong, China3Chengdu Xinshan Aerospace Technology Co., Ltd., Chengdu 610500, Sichuan, Chinashow less
Fig. 1. SEM and EDS images of composite powder. (a)(b) SEM images of powder; (c) size distribution of composite powder particles; (d) EDS images of powder
Fig. 2. Scanning strategy
Fig. 3. Influence of volume energy density on forming quality and relative density. (a) Relationship between forming quality and volume energy density; (b) relationship between relative density and volume energy density
Fig. 4. Metallographic pictures of formed samples at different volume energy density values (before corrosion). (a)‒(c) Cross section; (d)‒(f) longitudinal section
Fig. 5. XRD pattern of formed samples at different volume energy density values. (a) XRD pattern; (b) standard 2θ location of α-Ti
Fig. 6. Metallographic pictures of formed samples at different volume energy density values (after corrosion). (a)‒(d) Cross section; (e)‒(h) longitudinal section
Fig. 7. SEM images and local magnification images of SLM formed samples at different volume energy density values. (a)‒(l) Cross section; (m)‒(t) longitudinal section
Fig. 8. High magnification SEM images of SLM formed samples at different volume energy density values. (a)‒(d) Cross section; (e)‒(h) longitudinal section
Fig. 9. Effect of volume energy density on micro-hardness of TiC/TC4 composites
Fig. 10. EBSD analysis results. (a)‒(c) Cross-section IPF; (d)‒(f) longitudinal section IPF
Fig. 11. EBSD analysis results. (a)(b) Band contrast diagrams; (c)(d) phase diagrams
Fig. 12. EBSD results of sample when volume energy density of 85 J/mm3. (a) Longitudinal section IPF; (b) polar diagrams of β-Ti and α-Ti; (c) polar diagrams of β-Ti, α-Ti, and TiC at grain boundary; (d) polar diagrams of transgranular TiC and α-Ti
Fig. 13. Microstructure evolution diagrams of TiC/TC4 in cross-sectional and longitudinal sections. (a)(b) Diagrams of powder melting; (c)(d) schematics of cross section; (e)(f) schematics of longitudinal section
No. | Laser power /W | Scanning speed /(mm/s) | Hatch spacing /mm | Volume energy density /(J/mm3) |
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1 | 290 | 850 | 0.08 | 85 | 2 | 290 | 950 | 0.10 | 61 | 3 | 290 | 1050 | 0.12 | 46 | 4 | 290 | 1150 | 0.14 | 36 | 5 | 290 | 1250 | 0.16 | 29 | 6 | 310 | 850 | 0.10 | 73 | 7 | 310 | 950 | 0.12 | 54 | 8 | 310 | 1050 | 0.14 | 42 | 9 | 310 | 1150 | 0.16 | 34 | 10 | 310 | 1250 | 0.08 | 62 | 11 | 330 | 850 | 0.12 | 65 | 12 | 330 | 950 | 0.14 | 50 | 13 | 330 | 1050 | 0.16 | 39 | 14 | 330 | 1150 | 0.08 | 72 | 15 | 330 | 1250 | 0.10 | 53 | 16 | 350 | 850 | 0.14 | 59 | 17 | 350 | 950 | 0.16 | 46 | 18 | 350 | 1050 | 0.08 | 83 | 19 | 350 | 1150 | 0.10 | 61 | 20 | 350 | 1250 | 0.12 | 47 | 21 | 370 | 850 | 0.16 | 54 | 22 | 370 | 950 | 0.08 | 97 | 23 | 370 | 1050 | 0.10 | 70 | 24 | 370 | 1150 | 0.12 | 54 | 25 | 370 | 1250 | 0.14 | 42 |
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Table 1. Orthogonal experimental parameters of TiC/TC4 composites