Tech Briefs Magazine - December 2021 - 18

Functionally Graded Materials:
With some DED processes,
it is possible to mix materials
to create parts with alloy variation
to answer specific physical
or chemical conditions.
This image displays a section
of the material built with the
additive path. The color of the
path is changing as the AM
technology does. Starting
from a given alloy (blue), the
material is gradually changing
in the middle of the build to
another alloy (red). Gradual
alloy changes help to prevent
cracking at the junction of
two dissimilar materials.
Directed Energy Deposition
Offers Advantages for
dditive Manufacturing (AM)
is rapidly gaining in popularity
to the point that it is challenging
to have a conversation
about manufacturing
process options without mentioning it.
You might ask, " What is all the excitement
about AM processes? " or " How can
this new technology be used to resolve
real daily challenges? "
To help answer those questions, this
article will focus on Directed Energy
Deposition (DED). Looking at the history
of manufacturing, DED is not a new
18
Cov
Efficient
Additive Manufacturing
A
process. At a high abstract level, it can be
described as creating a melt pool and
adding material to an existing component
- such as welding two parts together,
which is not very exciting. But the way
DED is intended to be used today is new
because the goal is to automate the
process, to precisely control it, and to do
much more than weld two parts together.
As a comparison, when computer nu -
merical controls (CNCs) first came on the
scene for material removal manufacturing
processes, coming up to speed on using
CNCs was certainly quite challenging but
www.techbriefs.com
ToC
they were a game-changer all the same.
Once introduced, it was clear this was the
way to proceed for subtractive manufacturing.
After many years and enhancements,
we have collectively learned quite a lot
about this topic and the knowledge base is
substantial. Now we are facing the same
learning curve challenges with DED, as we
are still in the discovery phase of computer-aided
DED processes.
The following general information is
about what to look for when selecting
computer-aided manufacturing (CAM)
programming software for the DED/
Tech Briefs, December 2021

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Tech Briefs Magazine - December 2021

Table of Contents for the Digital Edition of Tech Briefs Magazine - December 2021

Tech Briefs Magazine - December 2021 - Intro
Tech Briefs Magazine - December 2021 - Sponsor
Tech Briefs Magazine - December 2021 - Cov1
Tech Briefs Magazine - December 2021 - Cov2
Tech Briefs Magazine - December 2021 - 1
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Tech Briefs Magazine - December 2021 - Cov3
Tech Briefs Magazine - December 2021 - Cov4
Tech Briefs Magazine - December 2021 - MD-Cov1
Tech Briefs Magazine - December 2021 - MD-Cov2
Tech Briefs Magazine - December 2021 - MD-1
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Tech Briefs Magazine - December 2021 - MD-Cov3
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