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. 2018 Jan 3;11(1):66. doi: 10.3390/ma11010066

Figure 9.

Figure 9

The optical microstructure of the samples perpendicular to the building direction of the SLM after T2 heat treatment: (a) the overall morphology; (b,c) found that the elliptical area of the precipitate accumulation in the overlapping area of the molten pool is more obvious: (d) the overlapping area of the molten pool is obviously depressed after corrosion.