Dissemination of IT for the Promotion of Materials Science (DoITPoMS)



Select the correct order of the AM manufacturing process.

Quick questions

You should be able to answer these questions without too much difficulty after studying this TLP. If not, then you should go through it again!

  1. Which of the following processes uses material extrusion to print?

    a Arburg Plastic Freeforming, APF
    b Selective Laser Sintering, SLS
    c Material Jetting, MJ
    d Digital Light Processing, DLP

Deeper questions

The following questions require some thought and reaching the answer may require you to think beyond the contents of this TLP.

  1. How does Stereolithography bond layers together?

    a Powder heats up, melting and fusing with the layer below
    b Newly deposited material is hot, partially melting the surface of the previous layer and entangles polymer chains, fusing
    c The previous layer is left in a green state so that the surface is left partially reacted. When the new layer is cured, the previous layer also reacts and binds
    d New layers are bound by adhesive which is applied between each layer as its printed

  2. Which of the following prints of a tensile test sample would you expect to have the highest ultimate tensile strength?

    a PLA, 90% fill, loaded in z direction
    b PLA, hollow, printed at 45° to the x direction and loaded in that direction.
    c ABS, 30% fill, loaded in x direction
    d PLA, 30% fill, printed on its side and loaded in the x direction.

  3. You wish to print a hollow section for a prototype. Which method of printing should you use?

    a Stereolithography, SLA
    b Electron Beam Melting, EBM
    c Multi Jet Fusion, MJF
    d Fused Deposition Modelling, FDM

  4. Which factor usually limits resolution in FDM?

    a Layer height
    b Minimum movement of nozzle in x-y plane
    c Nozzle diameter
    d Print temperature

  5. What is a key limitation that applies to all additive manufacturing processes?

    a Expensive
    b Lack of control over material properties
    c Printing has visible layer lines
    d Warping on printing