Additive manufacturing of industrially-relevant high-performance parts and products is today a reality, especially for metal additive manufacturing technologies. The design complexity that is now possible makes it particularly useful to improve product performance in a variety of applications. Metal additive manufacturing is especially well matured and is being used for production of end-use mission-critical parts. The next level of this development includes the use of intentionally designed porous metals - architected cellular or lattice structures. Cellular structures can be designed or tailored for specific mechanical or other performance characteristics and have numerous advantages due to their large surface area, low mass, regular repeated structure and open interconnected pore spaces. This is considered particularly useful for medical implants and for lightweight automotive and aerospace components, which are the main industry drivers at present. Architected cellular structures behave similar to open cell foams, which have found many other industrial applications to date, such as sandwich panels for impact absorption, radiators for thermal management, filters or catalyst materials, sound insulation, amongst others. The advantage of additively manufactured cellular structures is the precise control of the micro-architecture which becomes possible. The huge potential of these porous architected cellular materials manufactured by additive manufacturing is currently limited by concerns over their structural integrity. This is a valid concern, when considering the complexity of the manufacturing process, and the only recent maturation of metal additive manufacturing technologies. Many potential manufacturing errors can occur, which have so far resulted in a widely disparate set of results in the literature for these types of structures, with especially poor fatigue properties often found. These have improved over the years, matching the maturation and improvement of the metal additive manufacturing processes. As the causes of errors and effects of these on mechanical properties are now better understood, many of the underlying issues can be removed or mitigated. This makes additively manufactured cellular structures a highly valid option for disruptive new and improved industrial products. This review paper discusses the progress to date in the improvement of the fatigue performance of cellular structures manufactured by additive manufacturing, especially metal-based, providing insights and a glimpse to the future for fatigue-tolerant additively manufactured architected cellular materials.

如今，与工业相关的高性能零件和产品的增材制造已成为现实，尤其是对于金属增材制造技术而言。现在可能出现的设计复杂性使得在各种应用中提高产品性能特别有用。金属增材制造尤其成熟，并已用于生产最终用途的关键任务零件。这一发展的下一个阶段包括使用故意设计的多孔金属-蜂窝状或晶格结构。蜂窝结构可以针对特定的机械或其他性能特征进行设计或定制，并且由于它们的大表面积，低质量，规则的重复结构和开放的互连孔隙空间而具有众多优势。这被认为对于医疗植入物以及轻型汽车和航空航天部件特别有用，它们是目前主要的工业驱动力。造孔结构的行为类似于开孔泡沫，迄今为止已发现许多其他工业应用，例如用于吸收冲击的夹心板，用于热管理的散热器，过滤器或催化剂材料，隔音等。增材制造的蜂窝结构的优点是可以精确控制微体系结构。通过增材制造制造的这些多孔结构多孔材料的巨大潜力目前受到对其结构完整性的关注的限制。在考虑制造过程的复杂性时，这是一个合理的考虑，以及金属增材制造技术的最新成熟。可能会发生许多潜在的制造错误，迄今为止，文献中针对这些类型的结构导致了一系列截然不同的结果，通常发现疲劳性能特别差。这些年来，这些技术已经得到改善，与金属增材制造工艺的成熟和改进相匹配。由于现在已经更好地理解了错误的原因及其对机械性能的影响，因此许多潜在的问题都可以消除或缓解。这使得增材制造的蜂窝结构成为破坏性的新型和改进型工业产品的高度有效的选择。这篇综述文章讨论了迄今为止在通过增材制造制造的蜂窝结构的疲劳性能改善方面的进展，