Fig. 4
a Temperature profile at the point when the laser beam has passed 350 μm on the powder bed with different processing parameters. Overheat region with T ≥ TM is noted with continuous colormap while one with T < TM is noted with isotherms. Left inset: schematics of the presenting section (Sec. S-S′), the HM range (dashed line) as well as the beam spot (dash-dotted line), and the geometry of the overheat region which is characterized by width w and depth h. Maps of b the normalized width and c the normalized depth of the overheat region along with laser power and scan speed
