Microstructural evolution and mechanical properties of 300M steel produced by low and high power selective laser melting
Guanyi Jing, Wenpu Huang, Huihui Yang, Zemin Wang*(
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Fig. 9.. SEM images of the XZ sections of as-deposited 300M steel samples under various laser powers: (a) 300 W, (b) 600 W, (c) 800 W, (d) 1000 W, (e) 1900 W. Zone A and B represent the microstructure in the molten pool and heat-affected zone of as-deposited samples, respectively. Boundaries of columnar prior austenite grains (PAG) are marked by yellow dashed lines. Alpha ferrite (α-Fe) and granular carbides are indicated by the black and pink arrows, respectively.
