Abstract:Porous metallic materials are a class of materials characterized by their structurally and functionally integrated features, with a well-defined pore structure being their most notable attribute. This porous structure enables them to exhibit dual characteristics of both metallic and porous materials, making them widely applicable in fields such as nuclear industry, petrochemical engineering, and aerospace. Additive manufacturing technology allows for the integrated fabrication of complex porous metallic structures, offering advantages such as high material utilization and precise control over pore structure. This paper reviews the current development of additive manufacturing technologies for porous metallic materials, with a focus on analyzing the pore formation mechanisms and performance characteristics of additively manufactured porous metallic materials. It also summarizes their application progress in industries such as healthcare and tooling, discusses the integration of artificial intelligence in metallic additive manufacturing, and provides an outlook on the future development of this technology.