Energy input effect on morphology and microstructure of selective laser melting single track from metallic powder

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In situ heat treatment in selective laser melted martensitic AISI 420 stainless steels (2015, background): “Boundaries between cells are thick dislocation structures, different from the regular high-angle grain boundaries [3].”
Microstructure, Solidification Texture, and Thermal Stability of 316 L Stainless Steel Manufactured by Laser Powder Bed Fusion (2018, methodology): “This is an important observation because the primary cell spacing can be directly controlled through alterations of laser power and laser scanning speed [7].”
Influence of energy density on metallurgy and properties in metal additive manufacturing (2017, background): “In PBF systems, a powder bed is formed by spreading metallic powder layers from a powder dispensing mechanism onto a build area, also called substrate, which is typically made of metal materials [17,18].”
Microstructure and mechanical properties of 316L austenitic stainless steel processed by different SLM devices (2020, background): “therefore be understood as low-angle grain boundaries [8, 32].”
3D printing of Aluminium alloys: Additive Manufacturing of Aluminium alloys using selective laser melting (2019, background): “Pre-heating the powder before processing to improve its absorptivity [205] is also recommended.”