Abstract: 3D Printing or Additive manufacturing is a novel method of manufacturing parts directly from digital model by using layer by layer of metal powder infusing or sintering build-up approach. This manufacturing method can produce fully dense metallic parts or less density high durable models in short time compared to subtractive manufacturing from CNC, VMC, turners and lathe machine, with high precision. Features of additive manufacturing like freedom of part design, part complexity, light weighting, part consolidation and design for function are garnering particular interests in metal additive manufacturing for aerospace, oil & gas, marine and automobile applications. Powder bed fusion, in which each powder bed layer is selectively fused by using energy source like laser, is the most promising additive manufacturing technology that can be used for manufacturing small, low volume, complex metallic parts. This research provides an overview of 3D Printing technologies, materials used for metal 3D printing, applications, advantages, disadvantages, challenges, economics and applications of 3D metal printing technology in India and Bangladesh.

Keywords: Additive Manufacturing, 3D Printers, Metal 3D printers, Metal powder, Sintering.

| DOI: 10.17148/IARJSET.2021.8217