Session: 03-06 Metals: Mechanical Properties

Paper Number: 95507

95507 - Progress in Laser Direct Energy Deposition 

Laser Direct Energy Deposition is a useful tool for manufacturing and repair. Although it does not have the geometrical flexibility of Powder Bed Fusion, it is more easily implemented and is not restricted by bed size. Development and certification of Laser DED has evolved from simple repair operations to complex 3D shapes in advanced alloys.

This presentation will cover research in the following areas in Laser DED, involving nickel, titanium and other alloys:

Laser DED using powder for 3D build, particularly involving thin deposition layers to create net shape walled structures, such as rocket nozzles.

Laser DED using wire for various applications. TWI has been evaluating several commercially available systems, most of which offer omnidirectional deposition capability. 

EHLA - Ultra fast laser cladding for surfacing and ultimately 3D build. This technique interacts the laser with the powder stream before it hits the surface allowing very thin layer deposition, using controlled amounts of heat input. The result is thin layers, deposited at high speed, with a subtle metallic bond and very little heat affected zone. This allows dissimilar material deposition such as high performance coatings onto cost effective substrates. EHLA is a relatively new technique and the capability of the process is still being investigated, particularly for 3D builds.
 

Presenting Author: Robert Scudamore TWI

Presenting Author Biography: Robert Scudamore is an Associate Director and Group Manager of Advanced Manufacturing Technologies at TWI, based in the UK. He joined TWI after a PhD in Materials Science in 2000 and started working on Additive Manufacturing in 2002. Robert has mainly been involved technically in laser based AM, but is now the AM Lead at TWI. This covers laser, arc, EB, and thermal spray based AM, modelling, materials, inspection, heat treatment, powder morphology, certification and other areas.<br/><br/>Robert has been involved at European level through committee positions on the AM Sub-Platform to Manufuture, and the EFFRA Partnership Board. He has also been deputy chair of the AM National Strategy Committee in the UK.

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