Sediment

Process (computing)

Engineering

Lamination

Fabrication

Materials science

Deposition (geology)

Layer (electronics)

Computer security

Operating system

Computer science

Manufacturing engineering

Geology

Paleontology

Mechanical engineering

Alternative medicine

Nanotechnology

Process engineering

Medicine

Pathology

Key (lock)

International Journal of Precision Engineering and Manufacturing-Green Technology

Metal additive manufacturing technologies, such as powder bed fusion process, directed energy deposition (DED) process, sheet lamination process, etc., are one of promising flexible manufacturing technologies due to direct fabrication characteristics of a metallic freeform with a three-dimensional shape from computer aided design data. DED processes can create an arbitrary shape on even and uneven substrates through line-by-line deposition of a metallic material. Theses DED processes can easily fabricate a heterogeneous material with desired properties and characteristics via successive and simultaneous depositions of different materials. In addition, a hybrid process combining DED with different manufacturing processes can be conveniently developed. Hence, researches on the DED processes have been steadily increased in recent years. This paper reviewed recent research trends of DED processes and their applications. Principles, key technologies and the state-of-the art related to the development of process and system, the optimization of deposition conditions and the application of DED process were discussed. Finally, future research issues and opportunities of the DED process were identified.

Directed Energy Deposition (DED) Process: State of the Art