Additive manufacturing and processing by forming of Al-Ti metallic composites

通过形成 Al-Ti 金属复合材料进行增材制造和加工

• 批准号: 432161145
• 负责人: Professorin Dr.-Ing. Birgit Awiszus
• 金额: --
• 依托单位: Professur Werkstoff- und Oberflächentechnik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2020
• 资助国家: 德国
• 起止时间: 2019-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/432161145?language=en
• 关键词: Additive; manufacturing; processing; forming; Al

The purpose of this project is a fundamental understanding of the production and formability of additive manufactured Al-Ti metallic composites. For the first time, such composites are produced from aluminum and titanium by cold gas spraying and are hot-formed by die forging. First of all, the spray parameters have to be determined that layers with low porosity can be produced. In order to correspond to the nature of an additive manufacturing of solids, a large layer thickness has to be realised. That means an extension beyond the limits of previously produced thermal sprayed layer thicknesses.Since no information is available on the forming of cold gas sprayed coatings, their forming behaviour under realistic conditions is to be characterized. Therefore, the sprayed composites are formed under different process parameters and stress conditions by die forging. The microstructure and mechanical properties are evaluated on both, the composites produced and the subsequently formed composites using different investigation techniques. This allows the determination and fundamental understanding of the microstructure-property relationship along the entire process chain. In order to transfer the findings to further investigations, the numerical modeling of the forming process is performed on the basis of the determined mechanical properties and considering the actual solid structure.

该项目的目的是从根本上了解增材制造的铝钛金属复合材料的生产和成型性。这种复合材料首次由铝和钛通过冷气体喷涂生产，并通过模锻热成型。首先，必须确定喷涂参数，以产生低孔隙率的层。为了符合固体增材制造的性质，必须实现大的层厚度。这意味着超出了先前生产的热喷涂层厚度的限制。由于没有关于冷气喷涂涂层形成的信息，因此需要表征它们在实际条件下的形成行为。因此，通过模锻在不同的工艺参数和应力条件下形成喷涂复合材料。使用不同的研究技术对所生产的复合材料和随后形成的复合材料的微观结构和机械性能进行评估。这样可以确定并基本了解整个工艺链的微观结构-性能关系。为了将研究结果转化为进一步的研究，根据确定的机械性能并考虑实际的固体结构，对成形过程进行数值模拟。