The　heterogeneous　microstructure　of　a　laser　3D　printed　Ni-based　superalloy　was　examined　at　multiple　length　scales.　The　sub-millimeter-sized　columnar　crystal　grains　are　composed　of　micron-sized　cellular　colonies.　The　crystal　grains　grow　in　epitaxy　with　the　substrate　under　the　large　temperature　gradient　and　high　cooling　rate.　The　cell　boundaries,　decorated　with　γ/γ′　eutectics,　μ-phase　precipitates　and　high　density　of　dislocations,　show　enrichment　of　γ′　forming　elements　and　low-angle　misorientations.　Dislocations　trapped　in　the　intra-cellular　regions　are　characterized　as　statistically　stored　dislocations　with　no　detectable　contribution　to　lattice　curvature,　and　are　the　results　of　the　interaction　between　dislocations　and　γ′　precipitates.　©　2020　Elsevier　B.V.