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

• DOI: 10.1016/j.scriptamat.2020.08.028
• Publication Date: 2020-08-28T17:02:39Z
• Authors: Siyuan Peng; Shahryar Mooraj; Rui Feng; Liang Liu; Jie Ren; Yanfang Liu; Fanyue Kong; Zhiyu Xiao; Cheng Zhu; Peter K. Liaw; Wen Chen
• Keywords: 0205 materials engineering; 02 engineering and technology

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.