Directed Energy Deposition (DED)

What is one key advantage of DED technology compared to other metal additive manufacturing methods?

• It requires no energy source for material fusion.

• It can repair and add material to existing parts.

• It has the smallest feature resolution among metal AM technologies.

• It is primarily used for decorative purposes.

How does the powdered alloy metal material typically reach the energy source in DED printing?

• It's pre-laid as a uniform bed on the build platform.

• It's hand-fed manually during the printing process.

• It's directly extruded as a molten stream.

• It's blown through a nozzle in a gas stream to the focal point of the energy source.

Which of the following is a common application of DED technology?

• Manufacturing large structural metal parts and repairing damaged components

• Printing small, detailed plastic models

• Producing full-color ceramic parts

• Creating parts with high surface finishes without post-processing

What primarily determines the layer resolution in DED printing?

• The precision of the powder spreading mechanism

• The speed of the build platform

• The size of the energy beam and the material feed rate

• The type of shielding gas used

What are the two primary feedstock forms for material deposition in DED printers?

• Filament and liquid resin

• Metal powder and metal wire

• Metal sheets and liquid metal

• Granules and pellets

Which statement about powdered alloy metal materials used in DED printers is true?

• Only ferrous metals can be used.

• DED is limited to aluminum alloys.

• Polymers are the primary material used.

• A wide variety of powdered metals and alloys, such as titanium, stainless steel, and Inconel, can be used.

Which of the following energy sources is commonly used in DED printers?

• Ultrasound

• Focused laser beam

• Infrared radiation

• Electromagnetic induction

What is the primary process by which Directed Energy Deposition (DED) printers build parts?

• Melting a powder bed layer by layer

• Extruding a thermoplastic filament

• Depositing metal powder or wire and simultaneously melting it with a focused energy source

• Curing resin using a UV laser