Abstract In this study, we developed an approach to additive manufacturing of three-dimensional (3D)-architected CoCrFeNiMn high-entropy alloys by direct ink writing combined with thermal sintering. The 3D-architected CoCrFeNiMn lattices exhibit the outstanding energy absorption capacity that expands the envelope of existing architected materials. Such a high-energy absorption ability originates from the bend-dominated deformation mode of the 3D-architecture as well as the fully-annealed homogeneous microstructure of equiaxed grains, which collectively lead to remarkable strain hardening upon deformation. Our study provides a new avenue for 3D-printing advanced architected materials with extreme mechanical energy absorption for a myriad of structural applications.

中文翻译：

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具有高能量吸收的三维 (3D) 结构 CoCrFeNiMn 高熵合金的增材制造

摘要 在这项研究中，我们开发了一种通过直接墨水书写结合热烧结来增材制造三维 (3D) 结构的 CoCrFeNiMn 高熵合金的方法。3D 架构的 CoCrFeNiMn 晶格表现出出色的能量吸收能力，扩展了现有架构材料的范围。这种高能量吸收能力源于 3D 结构的弯曲主导变形模式以及等轴晶粒的完全退火均匀微观结构，这些共同导致变形时显着的应变硬化。我们的研究为 3D 打印具有极高机械能吸收能力的先进建筑材料提供了一条新途径，可用于无数结构应用。