Design and additive manufacturing of bionic hybrid structure inspired by cuttlebone to achieve superior mechanical properties and shape memory function  

作　　者：Luhao Yuan Dongdong Gu Xin Liu Keyu Shi Kaijie Lin He Liu Han Zhang Donghua Dai Jianfeng Sun Wenxin Chen Jie Wang 

机构地区：[1]Jiangsu Provincial Research Center for Laser Additive Manufacturing of High-Performance Components,College of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,Yudao Street 29,Nanjing 210016,People’s Republic of China

出　　处：《International Journal of Extreme Manufacturing》2024年第5期189-206,共18页极端制造（英文）

基　　金：supported by the National Natural Science Foundation of China(Grant No.52225503);National Key Research and Development Program of China(Grant No.2022YFB3805701);Development Program of Jiangsu Province(Grant Nos.BE2022069 and BE2022069-1);Postgraduate Research&Practice Innovation Program of Jiangsu Province(Grant No.KYCX21-0207).

摘　　要：Lightweight porous materials with high load-bearing,damage tolerance and energy absorption(EA)as well as intelligence of shape recovery after material deformation are beneficial and critical for many applications,e.g.aerospace,automobiles,electronics,etc.Cuttlebone produced in the cuttlefish has evolved vertical walls with the optimal corrugation gradient,enabling stress homogenization,significant load bearing,and damage tolerance to protect the organism from high external pressures in the deep sea.This work illustrated that the complex hybrid wave shape in cuttlebone walls,becoming more tortuous from bottom to top,creates a lightweight,load-bearing structure with progressive failure.By mimicking the cuttlebone,a novel bionic hybrid structure(BHS)was proposed,and as a comparison,a regular corrugated structure and a straight wall structure were designed.Three types of designed structures have been successfully manufactured by laser powder bed fusion(LPBF)with NiTi powder.The LPBF-processed BHS exhibited a total porosity of 0.042% and a good dimensional accuracy with a peak deviation of 17.4μm.Microstructural analysis indicated that the LPBF-processed BHS had a strong(001)crystallographic orientation and an average size of 9.85μm.Mechanical analysis revealed the LPBF-processed BHS could withstand over 25000 times its weight without significant deformation and had the highest specific EA value(5.32 J·g^(−1))due to the absence of stress concentration and progressive wall failure during compression.Cyclic compression testing showed that LPBF-processed BHS possessed superior viscoelastic and elasticity energy dissipation capacity.Importantly,the uniform reversible phase transition from martensite to austenite in the walls enables the structure to largely recover its pre-deformation shape when heated(over 99% recovery rate).These design strategies can serve as valuable references for the development of intelligent components that possess high mechanical efficiency and shape memory capabilities.

关 键 词：additive manufacturing laser powder bed fusion bionic structure CUTTLEBONE mechanical properties shape memory function 

分 类 号：TB391[一般工业技术—材料科学与工程]