Effects of initial 3D printed microstructures on subsequent microstructural evolution in 316L stainless steel

Plastic deformation of 3D printed components may occur when they are in use. Here we analyze the effects initial microstructure 316 L stainless steel on subsequent behavior, where apply 10% and 30% thickness reductions by cold rolling. The microstructures characterized electron backscatter diffraction (EBSD) transmission microscopy (TEM). Compared to conventionally manufactured (solution treated) samples, twinning is observed at lower strains twins be thinner intersecting inside some grains. These observations linked pre-existing dislocation structure dislocations various Burgers vectors facilitate twinning. Furthermore, cells with an average size 125 nm form cellular structure. strength calculated based microstructural parameters generally agrees experimental results, showing a large strengthening contribution from twin–matrix lamellae. present study provides fundamental ideas for engineering metals even better mechanical properties.