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The Electron Beam Surfi-Sculpt® Process and Mechanism Considering Potential Industrial Applications 1108/2018

 

The Electron Beam Surfi-Sculpt® Process and Mechanism Considering Potential Industrial Applications

By Tom Pinto

Industrial need

Surfi-Sculpt is a novel power beam materials processing technology implemented using either a laser beam or an electron beam (EB). Surfi-Sculpt and electron beam texturing (EBT) are neither additive nor subtractive processes. Instead, this process locally melts and moves the molten parent material of the workpiece to form a modified surface once it has cooled. The potential benefit of Surfi-Sculpt is its ability to rapidly manufacture a range of features with the same size, shape and distribution all of which can be varied to produce a surface tailored for a specific application.

Key Findings

  • EB Surfi-Sculpt has been studied using slow motion analysis allowing greater understanding of the process highlighting that there are four distinct phases in the formation of a Surfi-Sculpt feature.
  • Slow motion analysis has shown that the movement of molten material initially caused by the interaction of the EB is much more controlled than for laser Surfi-Sculpt.
  • A Surfi-Sculpt catalogue has enhanced TWI’s knowledge management process surrounding Surfi-Sculpt and EBT, ensuring more effective knowledge sharing, storage and refinement.
  • Heat exchanger testing has shown that the use of Surfi-Sculpt may approximately double the heat transfer coefficient at similar pressure drop for a 1000W heat load, compared with a conventional design and was able to maintain the operating temperature of a power resistor 30 degrees lower compared with a conventional design.
  • For composite to metal joining (Comeld™) use of a lower fibre density or more resin rich composite system may improve the lay up to ensure no voids are left. Shorter and/or blunter features may also be beneficial in this respect.

1108-2018-Image01a
Cone shaped features on 5mm Ti-6Al-4V substrate

1108-2018-Image02a

Ridge features on 6mm Al6082-T6 substrate

For more information please email:


contactus@twi.co.uk