4D printing of recoverable buckling-induced architected iron-based shape memory alloys

• DOI: 10.1016/j.matdes.2023.112216
• Publication Date: 2023-08-07T05:48:03Z
• Authors: A. Jafarabadi; I. Ferretto; M. Mohri; C. Leinenbach; E. Ghafoori
• Keywords: Pseudoelasticity; Smart material

Architected materials exhibit extraordinary properties in comparison with conventional and structures, resulting additional functionality efficiency by engineering the geometry harmony base material. Buckling-induced architected (BIAMs) are a class of that significant potential to absorb dissipate energy owing their local instabilities. Previous studies have shown trade-off between dissipation geometrical recoverability metallic BIAM, which limits use applications require both these features. This study, for first time, presents 4D printing buckling-induced iron-based shape memory alloys (BIA Fe-SMAs) using laser powder bed fusion (LPBF). The results show BIA Fe-SMAs can offer (i.e., recentring). study was conducted on two different alloy compositions Fe-17Mn-5Si-10Cr-4Ni. Quasi-static cyclic tests were performed Fe-SMAs, samples subsequently heated 200 oC activate effect (SME) could recover residual deformations accumulated during load SME material, led shape-recovery ratios 96.8 98.7% studied Fe-SMAs. this demonstrate yield an enhanced multi-functional behavior combining material's inherent functional functionalities structure. Notably, Fe-SMA reconfigure initial without damage after densification, sets them apart from crushable lattices.