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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Diagram of fracture mechanism of vertical sintered parts: (a) green part; (b) brown part. PLA vaporized and only bronze particles remained in the part; (c) metal part. Material fracture caused by uneven distribution of sintering concentration, gravity, and sand support effect.