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

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 s...

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Bibliographic Details
Published inInternational journal of precision engineering and manufacturing-green technology Vol. 8; no. 2; pp. 703 - 742
Main Author Ahn, Dong-Gyu
Format Journal Article
LanguageEnglish
Published Seoul Korean Society for Precision Engineering 01.03.2021
Springer Nature B.V
한국정밀공학회
Subjects
Additive manufacturing
Beds (process engineering)
CAD
Classification
Computer aided design
Deposition
Energy Efficiency
Engineering
Fabrication
Flexible manufacturing systems
Industrial and Production Engineering
Invited Review Paper
Lamination
Laser sintering
Manufacturing industry
Powder beds
Raw materials
Substrates
Sustainable Development
Thermal energy
Wire
기계공학
Research issues
Additive manufacturing process
State-of-the art
Directed energy deposition
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Summary: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.
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ISSN:2288-6206
2198-0810
DOI:10.1007/s40684-020-00302-7