Additive manufacturing (AM) technology has been widely adopted for the fabrication of metal lattices due to its freeform design capability over traditional manufacturing methods. However, the prevalent laser-based AM technologies possess high energy and investment consumption, and relatively low manufacturing speed, hampering their widespread adoption in building metal lattice components. In this study, an integrated approach of material extrusion AM, debinding, and sintering was introduced to produce 17–4 PH stainless steel plate-lattice structures in a time-efficient and cost-effective way. Three types of plate-lattice structures, namely body-centered cubic (BCC), face-centered cubic (FCC) and their combination (BCC-FCC), were successfully fabricated. Physical-mechanical behaviors, including physical deformation and compressive properties, were investigated through modeling, simulation, and experiments. Specifically, the shrinkage of the final sintered parts was predicted by the analytical modeling and characterized by experimental observation, the results of which showed a good consistency. The plate-lattice structure exhibited equiaxed grains on each surface, with a small portion of lath martensite observed at the top surface. Numerical simulation and compression test were conducted to reveal the compressive modulus, yield strength, and the fractural response at large compressive strains. All three types of plate-lattices possessed a lower compressive modulus than the simulated value, but still exhibited extraordinary yield strength under the compressive force compared to the truss-based or triply periodic minimal surface lattices. The successfully built metal plate-lattice structure verifies the great potential of material extrusion AM process, showing a great promise to fabricate complex metal lattice for large scale applications.

增材制造 (AM) 技术因其相对于传统制造方法的自由形状设计能力而被广泛用于金属晶格的制造。然而，流行的基于激光的增材制造技术具有较高的能源和投资消耗，以及相对较低的制造速度，阻碍了它们在构建金属晶格组件中的广泛应用。在这项研究中，引入了一种材料挤压增材制造、脱脂和烧结的集成方法，以一种省时且具有成本效益的方式生产 17-4 PH 不锈钢板格结构。成功制备了体心立方(BCC)、面心立方(FCC)及其组合(BCC-FCC)三种板格结构。物理-机械行为，包括物理变形和压缩性能，通过建模、仿真和实验研究。具体而言，通过解析建模预测最终烧结件的收缩率，并通过实验观察表征，结果显示出良好的一致性。板晶结构在每个表面都呈现等轴晶粒，在顶部表面观察到一小部分板条马氏体。进行了数值模拟和压缩试验，以揭示压缩模量、屈服强度和大压缩应变下的断裂响应。三种类型的板格均具有低于模拟值的压缩模量，但与基于桁架或三重周期最小表面格子相比，在压缩力下仍表现出非凡的屈服强度。