Reuse potential of recycled powder for additive manufacturing of AlSi10Mg alloy for corrosion resistant applications

为了在许多行业广泛实施添加剂制造，在保持零件质量的同时，提高这种先进制造技术的成本**可负担性是至关重要的。**工业合作伙伴添加剂金属制造公司(AMM)一直在研究一种创新想法，即**通过筛分操作从直接金属激光烧结(DMLS)过程中收集的未熔化粉末中分离出部分熔化或冷凝粉末**，并再次将这些回收粉末作为**进一步制造的**原料粉末。然而，AMM仍然不知道允许的粉末重复使用循环次数，而不会**对印刷组件的性能产生不利影响。这方面的知识对于生产具有一致性能的高质量零件非常**关键，特别是在海洋和航空航天等恶劣环境**应用中，在这些应用中，部件的高耐腐蚀性、质量**控制和标准化是关键要求。在这个项目中，我们的研究小组将在模拟海洋环境中研究粉末重复使用次数对由回收**粉末生产的DMLS制造的AlSi10 Mg_200C零件与其原始粉末制造的对应零件的**耐腐蚀性和完整性的影响。该项目旨在通过先进、创新和快速的粉末床技术来提高加拿大金属添加剂制造**技术的竞争力。此外，该项目**将帮助AMM和加拿大的其他制造商根据**加拿大政府关于通过在较轻金属的添加剂**制造中使用回收粉末来降低碳足迹的**规定，采用更环保的制造方法。

To increase widespread implementation of additive manufacturing in many industries, improving cost**affordability of this state of the art manufacturing technology, while maintaining the part's quality, is crucial.**Additive Metal Manufacturing Inc. (AMM), the industrial partner, has been investigating an innovative idea of**separating partially melted or condensate powder from the unmelted powder through a sieving operation,**collected during the direct metal laser sintering (DMLS) process, and reusing this recycled powder again as the**feedstock powder for further manufacturing. However, the number of permitted powder reuse cycles without**adversely affecting the properties of the printed component is still unknown to AMM. This knowledge is very**crucial in producing high-quality parts with consistent properties particularly for harsh environment**applications, such as in marine and aerospace, in which high corrosion resistivity of the component, quality**control, and standardization are critical requirements. In this project, the impact of powder reuse times on**corrosion resistance and integrity of the DMLS fabricated AlSi10Mg_200C parts produced from recycled**powders versus its virgin powder fabricated counterpart in a simulated marine environment will be investigated**by our research team. This project aims to enhance the competitiveness of metal additive manufacturing**technology in Canada with advanced, innovative, and fast powder bed technologies. In addition, this project**will help AMM and other manufacturer in Canada to adopt greener manufacturing practices in accordance with**Government of Canada mandate on lowering carbon footprint through the use of recycled powders in additive**manufacturing of lighter metals.