Li Shichun, Mo Bin, Xiao Gang, Sun Fujian. Microstructure Characteristics and Their Influence Factors During Laser Additive Manufacturing of Metal Materials[J]. Laser & Optoelectronics Progress, 2021, 58(1): 100007
- Laser & Optoelectronics Progress
- Vol. 58, Issue 1, 100007 (2021)
![OM morphology of cladding layer[1,3]. (a) Molten pool with fish scale shape; (b) columnar grains in molten pool and cellular subgrain structure in the grains; (c) morphology of transition layer; (d) morphology of interface between the transition layer and strengthening layer](/richHtml/lop/2021/58/1/0100007/img_1.jpg)
Fig. 1. OM morphology of cladding layer[1,3]. (a) Molten pool with fish scale shape; (b) columnar grains in molten pool and cellular subgrain structure in the grains; (c) morphology of transition layer; (d) morphology of interface between the transition layer and strengthening layer
![OM morphology of Al-Cu-Mg parts produced by SLM[5]. (a) Morphology of the laser tracks corresponding to alternating x/y-raster filling strategy; (b) detail of the scanning tracks in Fig. (a)](/richHtml/lop/2021/58/1/0100007/img_2.jpg)
Fig. 2. OM morphology of Al-Cu-Mg parts produced by SLM[5]. (a) Morphology of the laser tracks corresponding to alternating x/y-raster filling strategy; (b) detail of the scanning tracks in Fig. (a)
![EBSD spectrum and corresponding 〈100〉 pole figure of cladding layer of AlSi10Mg parts[6]. (a) EBSD spectrum; (b) 〈100〉 pole figure](/Images/icon/loading.gif){kind=icon}
Fig. 3. EBSD spectrum and corresponding 〈100〉 pole figure of cladding layer of AlSi10Mg parts[6]. (a) EBSD spectrum; (b) 〈100〉 pole figure
Fig. 4. Microstructure morphology of Ti-6Al-2Zr-2Sn-3Mo-1.5Cr-2Nb parts produced by two sets of process parameters[7]. (a) Laser power P = 2500 W, scanning speed Vb = 50 mm/s, and spot diameter D = 3 mm; (b) P = 1800 W, Vb = 10 mm/s, D = 3 mm
Fig. 5. Schematic of the microstructure distribution of Inconel 718 alloy fabricated by SLM[9]
Fig. 6. Microstructure of 300M steel parts at different positions[13]. (a) Bottom of 300M steel parts; (b) middle of 300M steel parts; (c) top of 300M steel members
Fig. 7. SEM images of the Al-Zn-Mg-Cu parts[14]. (a)(b) Parts produced by SLM (white phase is η phase); (c)(d) ST6 parts
Fig. 8. SEM images of cladding layer[15]. (a) Top of cladding layer; (b) precipitates
Fig. 9. Morphology of surface and cross section microstructure of LMD low alloy steel[21]. (a)?(c) Morphology of surface microstructure; (d)?(f) morphology of microstructure of cross section
Fig. 10. Direction representation of the temperature gradient in the different shape molten pool[30]. (a) Molten pool with smaller weld width and larger weld depth; (b) molten pool with larger weld width and smaller weld depth
Fig. 11. Microstructure morphology of cladding layer produced at different mass deposition rates[51]. (a) 6 g/min; (b) 11 g/min; (c) 15 g/min; (d) 25 g/min
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