Additive manufacturing of reactive metals has opened door to consider using metal 3D printing to manufacture aluminum alloys for different applications from automotive and aerospace to defense. However, one of the major milestones of adopting the technology is still the high price of metal powder in comparison to casting methods. Using recycled powder to additively manufacture parts can be considered one way to decrease the final price in this technology. In the present paper, the microstructural evolution and mechanical properties of the DMLS-AlSi10Mg_200C alloy manufactured by recycled powder were investigated. As the first step of this research, the powder characteristics, i.e. morphology, average particle size, microstructure and composition, of virgin, condensate and recycled AlSi10Mg powder were studied. It was inferred that virgin and recycled powders had comparable powder characteristics, which are very different in comparison to the condensate powder. In the second step of this research, microstructural and mechanical characterization of the as-built DMLS-AlSi10Mg_200C alloy using recycled powder revealed that elongation of horizontally built DMLS-AlSi10Mg_200C was higher compared to that of vertically built. In addition, the fracture surfaces of vertically and horizontally built samples were investigated and possible fracture modes discussed. It is confirmed that, the microstructure and mechanical behavior of the as-built as-built DMLS-AlSi10Mg_200C manufactured by recycled powder were similar to that of virgin powder.

活性金属的增材制造打开了考虑使用金属3D打印技术制造铝合金的大门，该合金可用于从汽车，航空航天到国防的各种应用。然而，与铸造方法相比，采用该技术的主要里程碑之一仍然是金属粉末的高昂价格。使用回收的粉末来增材制造零件可以被认为是降低这项技术最终价格的一种方法。本文研究了回收粉制备的DMLS-AlSi10Mg_200C合金的组织演变和力学性能。作为本研究的第一步，研究了原始，冷凝物和回收的AlSi10Mg粉末的粉末特性，即形态，平均粒径，微观结构和组成。可以推断，原始粉末和回收粉末具有可比的粉末特性，与冷凝粉末相比有很大不同。在这项研究的第二步中，使用再生粉末对已建成的DMLS-AlSi10Mg_200C合金的显微组织和力学性能进行了分析，结果表明，水平建造的DMLS-AlSi10Mg_200C的伸长率比垂直建造的要高。此外，还研究了垂直和水平构建的样品的断裂面，并讨论了可能的断裂模式。可以肯定的是，由回收粉末制成的已建成的DMLS-AlSi10Mg_200C的建成组织和力学性能与原始粉末相似。在这项研究的第二步中，使用再生粉末对已建成的DMLS-AlSi10Mg_200C合金的显微组织和力学性能进行了分析，结果表明，水平建造的DMLS-AlSi10Mg_200C的伸长率比垂直建造的要高。此外，还研究了垂直和水平构建的样品的断裂面，并讨论了可能的断裂模式。可以肯定的是，由回收粉末制成的已建成的DMLS-AlSi10Mg_200C的建成组织和力学性能与原始粉末相似。在这项研究的第二步中，使用再生粉末对已建成的DMLS-AlSi10Mg_200C合金的显微组织和力学性能进行了分析，结果表明，水平建造的DMLS-AlSi10Mg_200C的伸长率比垂直建造的要高。此外，还研究了垂直和水平构建的样品的断裂面，并讨论了可能的断裂模式。可以肯定的是，由回收粉末制成的已建成的DMLS-AlSi10Mg_200C的建成组织和力学性能与原始粉末相似。研究了垂直和水平构建的样品的断裂面，并讨论了可能的断裂模式。可以肯定的是，由回收粉末制成的已建成的DMLS-AlSi10Mg_200C的建成组织和力学性能与原始粉末相似。研究了垂直和水平构建的样品的断裂面，并讨论了可能的断裂模式。可以肯定的是，由回收粉末制成的已建成的DMLS-AlSi10Mg_200C的建成组织和力学性能与原始粉末相似。