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Cold Spray Additive Manufacturing (CSAM) (also called as Cold Spray 3D printing) is a utilization of the Cold spraying to fabricate freestanding parts or to build features on existing components. During the process, fine powder particles are accelerated in a high-velocity compressed gas stream, and upon the impact on a substrate or backing plate, deform and bond together creating a layer. Passing the nozzle over a substrate repeatably, a deposit is building up layer by layer, to form a part or component. If an industrial robot or computer controlled manipulator controls the spray gun movements, complex shapes can be created. To achieve 3D shape, there are two different approaches. First to fix the substrate and move the cold spray gun/nozzle using a robotic arm, the second one is to move the substrate with a robotic arm, and keep the spray-gun nozzle fixed. There is also a possibility to combine these two approaches either using two robotic arms[1] or other manipulators[2]. The process always requires a substrates as starting plate and uses only powder as raw material.

This technique is distinct from Selective laser melting or Electron-beam additive manufacturing or other additive manufacturing process using laser or electron beam for melting the feedstock materials.

History

The origins of the cold spray process goes back to the beginning of the 20th century, when it was developed and patented by Thurston.[3] The process was further investigated by in the 1950s by Rocheville[4][3] and was re-discovered in 1980s at the Institute of Theoretical and Applied Mechanics of the Russian Academy of Science[5] and developed as a coating technology. The process started to be considered to be utilized for additive repair and fabrication of freeform structures, what can be considered as additive manufacturing, at the beginning of 21st century, when the first commercial cold spray system was introduced to the market.[6]

Process

Additive manufacturing utilizing the process of Cold spraying and its benefits can be considered as a deposition process, capable to build freeform parts and structures at high rates. Since it is a solid-state coating deposition process, during the process no melting of the feedstock material (metal powder) occurs, there are no heat related distortion and no protective atmosphere required, which enables to build up structures layer by layer, theoretically without dimensional limitation, to fabricate individual components and to repair damaged components.

The largest 3D printer or Additive Manufacturing machine utilizing cold spray can build parts up to 9×3×1.5 m.[7]. During the cold spray process, the impacting particles creates the layer, which thickness can differ, based on the spray gun travel speed against the substrate and the feedstock material feed rate, building the structure layer-by-layers.

Materials

In Cold spraying, the principle of the process is based on plastic deformation of the feedstock powder particles, therefore it is suitable to deposit with this technique mainly pure metals and alloys, but also metallic glasses, metal matrix composites and in some cases polymers.[4] The research and development activities recently focusing on a few most challanging materials for the aircraft, space and defence industry such as aluminum alloys[8], Nickel base superalloys[9][10], differnt steel grades[11][12] and titanium alloys[13][14]

Applications

Space and aerospace applications

  • Propellant tank additive manufactuirng, utilizing the advantage of the process to deposit titanium and titanium alloys without melting the feedstock material.[15]
  • Trust chambers, combustion chambers and rocket nozzles, where to process gives the benefit of unlimited dimensions and combination of different materials, which is also utilized to create the channels for conformal colling of these components.[16]
  • The additive manufacturing repair developed for aircraft engine components is utilizing the solid state of the cold spray process, using 2 robotic arms and on-line 3D scanning to apply the deposit onto the complex geometry of a fan blade.[1]
  • The Cold Spray Additive Manufacturing process is being applied as well for additive repair of gearboxes and other aircraft components.[17]

Tool and mould making

Forming, casting and stamping tools with conformal cooling end heating conducting elements, enabling shorter cycle times and significantly elongate the lifetime of these tools[18][19]

Defence applicaitons

Titanium drones manufactured by Cold Spray Additive Manufacturing[20]

Others applications

  • Titanium tubes and other direct manufactured components[21]
  • Permanent magnets for electric motors, deposited directly to the motor housing using the Cold Spray Additive Manufacturing technique, leading to reduced cost and providing greater freedom in the design process[22]

Difference from other AM methods

The most significant differences between the Cold Spray Additive Manufacturing process and other additive manufacturing processes is the low temperature, solid state of the process, avoiding melting the feedstock material.

Benefits

  • Very high deposition rates, up to 20kg/h depending on the material density.
  • No protective atmosphere required.
  • Possibility to connect or combine dissimilar materials, such as metals with different melting point.
  • Build-up dimensions limited only by the spray-gun and/or component manipulator.
  • Capable to deposit almost all metals & alloys.
  • The process has low energy consumption and produces no toxic waste.
  • Possibility to collect and reuse 100% of particles.
  • Application of several powder feeders permits to perform separate injection of different materials in case of deposition of multicomponent coatings.
    [23]

Constraints

  • The process resolution is limited due to the "spray spot" size, which is usually several millimeter.
  • Due to the severe plastic deformation of the particles, residual stresses in the deposit can accumulate, leading to distortion, deformation or cracks.
  • To reach the mechanical properties of the additive manufactured components, comparable to bulk material properties, post treatment of the component might be required.

Equipment producers

See also

3D printing
Electron-beam freeform fabrication
Selective laser sintering
Selective laser melting

References

  1. ^ a b Alhart, Todd (15 December 2017). "Brothers In Arms: These Robots Put A New Twist On 3D Printing". GE Reports.
  2. ^ a b http://www.kms-wirkt.de, KMS GmbH & Co KG (4 July 2019). "Maschinenfabrik Berthold Hermle AG - Hermle MPA Technology – additive manufacturing, milling at its best". Maschinenfabrik Berthold Hermle AG. {{cite web}}: External link in |last1= (help)
  3. ^ a b Morgan, R. H. (2003). "Cold Gas Dynamic Manufacturing - A new approach to Near-Net Shape Metal Component Fabrication" (PDF). Mat. Res. Soc. Symp. Proc. Vol. 758 (Mat. Res. Soc. Symp. Proc.): 73–84. Retrieved 3 July 2019. {{cite journal}}: |volume= has extra text (help)
  4. ^ a b Raoelison, R.N. (2017). "Cold gas dynamic spray additive manufacturing today: Deposit possibilities, technological solutions and viable applications". Materials and Design (133): 266–287. Retrieved 3 July 2019.
  5. ^ Papyrin, Anatolii (2007). Cold spray technology. Elsevier. p. 336. ISBN 978-0-08-045155-8.
  6. ^ Morgan, R. H; Sutcliffe, C. J.; Pattison, J.; Gallagher, C.; Fox, P.; O'Neill, W.; Murphy, M. (2003). "Cold Gas Dynamic Manufacturing - A new approach to Near-Net Shape Metal Component Fabrication" (PDF). Mat. Res. Soc. Symp. Proceedings. Vol. 758. Retrieved 5 July 2019. {{cite journal}}: |volume= has extra text (help)
  7. ^ "AUS - World's Largest 3D Printer Prints 1.8 Metre Titanium Drone". foundry-planet.com - B2B Portal. 4 July 2019. Retrieved 4 July 2019.
  8. ^ Petráčková, K.; Kondás, J.; Guagliano, M. (25 September 2017). "Mechanical Performance of Cold-Sprayed A357 Aluminum Alloy Coatings for Repair and Additive Manufacturing". Journal of Thermal Spray Technology. 26 (8): 1888–1897. doi:10.1007/s11666-017-0643-5.
  9. ^ Bagherifard, Sara; Monti, Stefano; Zuccoli, Maria Vittoria; Riccio, Martina; Kondás, Ján; Guagliano, Mario (April 2018). "Cold spray deposition for additive manufacturing of freeform structural components compared to selective laser melting". Materials Science and Engineering: A. 721: 339–350. doi:10.1016/j.msea.2018.02.094.
  10. ^ Bagherifard, Sara; Roscioli, Gianluca; Zuccoli, Maria Vittoria; Hadi, Mehdi; D’Elia, Gaetano; Demir, Ali Gökhan; Previtali, Barbara; Kondás, Ján; Guagliano, Mario (23 May 2017). "Cold Spray Deposition of Freestanding Inconel Samples and Comparative Analysis with Selective Laser Melting". Journal of Thermal Spray Technology. 26 (7): 1517–1526. doi:10.1007/s11666-017-0572-3.
  11. ^ Chen, Chaoyue; Yan, Xingchen; Xie, Yingchun; Huang, Renzhong; Kuang, Min; Ma, Wenyou; Zhao, Ruixin; Wang, Jiang; Liu, Min; Ren, Zhongming; Liao, Hanlin (January 2019). "Microstructure evolution and mechanical properties of maraging steel 300 fabricated by cold spraying". Materials Science and Engineering: A. 743: 482–493. doi:10.1016/j.msea.2018.11.116.
  12. ^ Yin, Shuo; Cizek, Jan; Yan, Xingchen; Lupoi, Rocco (July 2019). "Annealing strategies for enhancing mechanical properties of additively manufactured 316L stainless steel deposited by cold spray". Surface and Coatings Technology. 370: 353–361. doi:10.1016/j.surfcoat.2019.04.012.
  13. ^ MacDonald, D.; Fernández, R.; Delloro, F.; Jodoin, B. (9 December 2016). "Cold Spraying of Armstrong Process Titanium Powder for Additive Manufacturing". Journal of Thermal Spray Technology. 26 (4): 598–609. doi:10.1007/s11666-016-0489-2.
  14. ^ Chen, Chaoyue; Xie, Yingchun; Yan, Xingchen; Yin, Shuo; Fukanuma, Hirotaka; Huang, Renzhong; Zhao, Ruixin; Wang, Jiang; Ren, Zhongming; Liu, Min; Liao, Hanlin (May 2019). "Effect of hot isostatic pressing (HIP) on microstructure and mechanical properties of Ti6Al4V alloy fabricated by cold spray additive manufacturing". Additive Manufacturing. 27: 595–605. doi:10.1016/j.addma.2019.03.028.
  15. ^ "TWI expert delivers cold spray talk to European Space Agency". twi-global.com.
  16. ^ Gradl, Paul R. "Rapid Fabrication Techniques for Liquid Rocket Channel Wall Nozzles". NASA. Retrieved 4 July 2019.
  17. ^ Bovalino, Yari M. (15 November 2017). "Secret Weapon: This Supersonic Blaster Rebuilds Jet Parts With Flying Powder". GE Reports.
  18. ^ http://www.kms-wirkt.de, KMS GmbH & Co KG (4 July 2019). "Maschinenfabrik Berthold Hermle AG - Applications of Hermle generative MPA technology". Maschinenfabrik Berthold Hermle AG. {{cite web}}: External link in |last1= (help)
  19. ^ "HERMLE MPA - Additive fretigen" (PDF). Technische Hochschule Ostwestfalen-Lippe. Retrieved 5 July 2019.
  20. ^ "AUS - World's Largest 3D Printer Prints 1.8 Metre Titanium Drone". foundry-planet.com - B2B Portal. 4 July 2019.
  21. ^ Jahedi, Mahnaz Z.; Zahiri, Saden H.; Gulizia, Stefan; Tiganis, Bill; Tang, C.; Fraser, Darren (April 2009). "Direct Manufacturing of Titanium Parts by Cold Spray". Materials Science Forum. 618–619: 505–508. doi:10.4028/www.scientific.net/MSF.618-619.505.
  22. ^ Davies, Sam (29 January 2018). "Canadian researchers utilise cold spray additive manufacturing for electric motor magnets". TCT Magazine.
  23. ^ Sova, A.; Grigoriev, S.; Okunkova, A.; Smurov, I. (2 August 2013). "Potential of cold gas dynamic spray as additive manufacturing technology". The International Journal of Advanced Manufacturing Technology. 69 (9–12): 2269–2278. doi:10.1007/s00170-013-5166-8.
  24. ^ "Titomic - Industrial Scale Additive Manufacturing, 3D Printing, Titanium, Innovative, Melbourne, Australia". www.titomic.com.
  25. ^ "SPEE3D". Retrieved 4 July 2019.
  26. ^ "Impact Innovations - Your partner for cold spray and engineering". www.impact-innovations.com.
  27. ^ "Cold Spray System PCS-1000". www.plasma.co.jp.
  28. ^ "Kinetic Metallization: Coatings Once Thought Impossible". www.inovati.com.
  29. ^ "VRC Metal Systems – Making Metals Work".
  30. ^ "CenterLine Supersonic Spray Technology". www.supersonicspray.com.
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