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

SCRIPTA MATERIALIA

卷:190

Article

Peng, Siyuan^1,2  Mooraj, Shahryar¹  Feng, Rui³  Liu, Liang¹  Ren, Jie¹  Liu, Yanfang¹  Kong, Fanyue¹  Xiao, Zhiyu²  Zhu, Cheng⁴  Liaw, Peter K.³  Chen, Wen¹ 

[1] Univ Massachusetts, Dept Mech & Ind Engn, Amherst, MA 01003 USA

[2] South China Univ Technol, Natl Engn Res Ctr Near Net Shape Forming Metall M, Guangzhou 510640, Peoples R China

[3] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA

[4] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

关键词: Additive manufacturing;    Direct ink writing;    High-entropy alloy;    Architected materials;    Mechanical property;   

DOI  :  10.1016/j.scriptamat.2020.08.028

来源: Elsevier

【 摘 要 】

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. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free