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This invention describes a way to build 3D objects layer by layer, similar to 3D printing. It involves spreading a first layer of powder, then using an energy beam to melt and fuse only a specific part of that layer. After that, a second layer of powder is added, and an energy beam melts and fuses a part of it, making sure it connects precisely to the previously melted section of the first layer. This process is repeated to build the complete object.
Why it matters: Since 2016, advancements in directed energy sources and process control software have significantly improved the precision and repeatability of localized heating and fusion in additive manufacturing. This makes the specific method of heating a portion of a previous layer before adding the next, as claimed, more practically implementable for achieving desired material properties.
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