I am especially interested in the optimized support structure (slide 3) which shows a dramatically reduced amount of support structure material being used. This is can be very significant for certain applications. Not only will this save money (less material used), but will also allow for a much faster cleanup of parts (saves time). In addition to this, certain designs have very delicate features. By creating a minum amount of material to remove on these delicate features, part breakage and damage can also be reduced.
Although I listed it last, the ASTM standards effort to determine the mechanical properties of materials made with AM processes just might end up being the most important of these. There's continuing debate in the industry about the strength and durability of materials made by layering, and a metric for discussing and assessing them is a good start.
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