Incheon Regional Division, Korea Institute of Industrial Technology, Incheon 21999, Korea
a Department of Materials Science & Engineering, Hanyang University, Seoul 04763, Korea
© The Korean Powder Metallurgy Institute. All rights reserved
Binder jetting AM [19-23]: 2D pattern is fabricated by dropping binder on the pre-placed powder bed. 3D primitive part is consolidated by polymerized binder which was infiltrated into powder bed. Polymers, metals, ceramics, and composites are built.
Directed energy deposition AM [24-28]: Wire or powder feedstock is fed into molten pool which is generated by high energy density heat sources such as laser, e-beam, and plasma transferred arc. Meltingsolidification is the main consolidation mechanism. Because feedstock is in-situ fed into local molten pool, chamber is not imperative. Metals are usually used.
Materials extrusion AM [29-33]: Feedstock materials such as thermoplastic filament or polymer bearing composite feedstock are extruded and placed on demand. Polymerization hardens the deposit.
Materials jetting AM [34-38]: Photopolymers are jetted and in-situ cured by light sources.
Powder bed fusion AM [39-43]: Laser or e-beam is irradiated on pre-placed powder bed and solidification of molten pool results in consolidation. Another powder layer is placed on the previous patterned layer.
Sheet lamination AM [44-48]: Sheet is placed and bonded to previous layer. 2D pattern is translated on the bonded sheet by knife or laser.
Vat photo-polymerization AM [49-53]: Liquid photopolymer is contained in a specific vat and it is hardened by light irradiation. Working plate is immersed into liquid photopolymer at pre-set depth after 2D patterning.
Divisionc | Polymers | Metals | Ceramics | Composites |
---|---|---|---|---|
|
||||
AM materials |
Thermoplastics Thermosets Photopolymers Elastomers |
Powders Wires Sheets |
Structural ceramics Functional ceramics Bio-ceramics |
PMC MMC CMC |
ASTM classification | Commercialized process (Maker) | Process time* | Properties | ||
---|---|---|---|---|---|
|
|||||
Relative density (%) | Accuracy (mm) | Surface roughness (Ra/um) | |||
|
|||||
Binder jetting | Digital part materialization (ExOne) | 10 hours** | > 95*** | ~ +/- 2.0 | ~ 9 |
Powder bed fusion | Electron beam melting (Arcam AB) | 12 hours | > 99 | ~ +/- 0.2 | ~ 20 |
Directed metal laser sintering (EOS) | Laser engineered net shaping (Optomec) | 24 hours | > 99 | ~ +/- 0.05 | ~ 9 |
Directed energy deposition | Ultrasonic additive manufacturing | 10 hours | > 99 | ~ +/- 0.125 | ~ 25 |
Sheet lamination | (Fabrisonic LLC) | 24 hours | > 99 | ~+/- 0.015 | ~ 7 |