Additive manufacturing of three-dimensional (3D)-architected CoCrFeNiMn high- entropy alloy with great energy absorption

作者：Peng, Siyuan; Mooraj, Shahryar; Feng, Rui; Liu, Liang; Ren, Jie; Liu, Yanfang; Kong, Fanyue; Xiao, Zhiyu; Zhu, Cheng; Liaw, Peter K.; Chen, Wen^*

来源：Scripta Materialia, 2021, 190: 46-51.

DOI：10.1016/j.scriptamat.2020.08.028

• Additive manufacturing
• Direct ink writing
• High-entropy alloy
• Architected materials
• Mechanical property

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.