Question

Benifits of direct energy deposition process​

Answer 1

Answer:

Advantages of DED

High build rates – DED’s higher deposition rates at relatively low resolution means faster build rate compared to some other metal additive manufacturing process

Dense and strong parts – DED creates higher density parts hence their mechanical properties are as good as cast or wrought material

Near net shape – Parts can be near net shapes requiring minimal amount of post-processing

Can be used for repairing – Ideally suited for application requiring metal addition to existing parts hence lends itself for repairing applications

Multi-material range – Latest DED machines have the capability to have several different powders or wire containers which enables to build parts with custom alloy

Larger parts – Comparably larger parts can be built using DED. For example, Sciaky’s EBAM printers have the capability to print parts a few meters high

Easy material change – Since the material is fed during the process on demand from separate powder containers, it’s easy to refill or change the material

Reduced material waste – DED only deposits the material it needs during the process meaning less wastage compared to processes like powder bed fusion (SLS and DMLS) where, the full build platform has to be filled with metal powder

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Answer 2

Advantages of DED:

,✒High build rates – DED’s higher deposition rates at relatively low resolution means faster build rate compared to some other metal additive manufacturing process.

✒Dense and strong parts – DED creates higher density parts hence their mechanical properties are as good as cast or wrought material

✒Near net shape – Parts can be near net shapes requiring minimal amount of post-processing

✒Can be used for repairing – Ideally suited for application requiring metal addition to existing parts hence lends itself for repairing applications

✒Multi-material range – Latest DED machines have the capability to have several different powders or wire containers which enables to build parts with custom alloy

✒Larger parts – Comparably larger parts can be built using DED. For example, Sciaky’s EBAM printers have the capability to print parts a few meters high

✒Easy material change – Since the material is fed during the process on demand from separate powder containers, it’s easy to refill or change the material

✒Reduced material waste – DED only deposits the material it needs during the process meaning less wastage compared to processes like powder bed fusion (SLS and DMLS) where, the full build platform has to be filled with metal powder

Disadvantages of DED

✒High capital cost – Direct energy deposition systems are comparably very expensive to the other types of metal additive manufacturing systems

✒Low build resolution – Parts produced using DED technology are lower in resolution with a poor surface finish. It will look like sand or investment castings and would require secondary processing such as machining or aqua blasting, hence adding more time and cost

✒No support structures – Due to its nature of how the DED technology builds parts, support structures cannot be used during the build process, hence features like overhangs will not be possible