文献类型：期刊文献

英文题名：Fabrication of bimetallic interpenetrating structures with enhanced impact resistance via 3D-printing of high-entropy alloy lattices and vacuum melt infiltration of Al-based alloys

作者：Huang, Guoqing[1,2];Li, Bo[1,2,3,4]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, 130 Meilong Rd, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, Addit Mfg & Intelligent Equipment Res Inst, Shanghai, Peoples R China;[3]Shanghai Collaborat Innovat Ctr High end Equipment, Shanghai, Peoples R China;[4]Boside Nantong Intelligent Equipment Technol Co Lt, Nantong, Peoples R China

年份：2025

卷号：20

期号：1

外文期刊名：VIRTUAL AND PHYSICAL PROTOTYPING

收录：;EI(收录号：20250817921686);WOS:【SCI-EXPANDED(收录号:WOS:001422009700001)】；

基金：This research work is sponsored by the National Natural Science Foundation of China (grant number 52175140), and National Key R&D Programme of China (grant number 2022YFB4602102).

语种：英文

外文关键词：Interpenetrating phase composite; Laser Powder Bed Fusion; vacuum fusion infiltration; Impact resistance

摘要：Lattice truss architectures fabricated from CoCrFeMnNi high-entropy alloys (HEAs) through the precision of Laser Powder Bed Fusion (L-PBF) technology were subsequently enhanced via vacuum impregnation with an aluminium alloy, resulting in the creation of a sophisticated bimetallic interpenetrating phase composite (IPC) architecture. Upon exposure to high-speed impact loading using a Split-Hopkinson Pressure Bar (SHPB), these IPCs exhibited exceptional comprehensive impact resistance, particularly notable for their superior energy absorption capabilities. This enhanced performance is attributed to the seamless integration of the distinctive physical properties of the HEA and the Al-based alloy, which together enable coordinated deformation of the bimetallic phases during impact. Detailed analysis of the metallurgical bonding microstructure at the bimetallic interfaces revealed the formation of robust bonding structures both during the impregnation process and after impact-induced failure, with the strengthening effect at the dissimilar material interfaces playing a crucial role in energy absorption by amplifying energy dissipation through crack propagation in the diffusion interface layer. Notably, under equivalent mass conditions, the impact resistance of these IPCs significantly surpasses that of the Al-based alloy alone, demonstrating the potential of this engineered, hierarchical structure as a lightweight, impact-resistant material.