文献类型：期刊文献

英文题名：Micro-laminated CoCrFeMnNi TiNp/CoCrFeMnNi high-entropy alloy matrix composite with bimodal grain structure via multi-material selective laser melting (MM-SLM) additive manufacturing

作者：Li, Bo[1,2];Zhang, Wei[1];Shen, Jianchao[1];Xuan, Fuzhen[1,3]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Addit Mfg & Intelligent Equipment Res Inst, Shanghai 200237, Peoples R China;[3]Shanghai Collaborat Innovat Ctr High end Equipmen, Shanghai 200237, Peoples R China

年份：2022

卷号：36

外文期刊名：COMPOSITES COMMUNICATIONS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000909628700003)】；

基金：This work is financially sponsored by National Natural Science Foundation of China (Grant No. 52175140), Natural Science Foundation of Shanghai, in China (Grant No. 20ZR1414000).

语种：英文

外文关键词：High-entropy alloy; Metal matrix composite; Additive manufacturing; Multi-material selective laser melting

摘要：Deviating from most studies on selective laser melting (SLM) additively manufactured single metals or homogeneous metal matrix composites (MMCs), this work engaged in a multi-material SLM (MM-SLM) route for micro-laminated MMCs with bimodal grain structures. Structurally hierarchical micro-laminate of CoCrFeMnNi high-entropy alloy (HEA)-based HEA TiNp/HEA MMC was built by the MM-SLM to overcome the strength-ductility trade-off and improve the anti-impact performance under high strain-rate compression deformation. The dynamic impacts were performed on the SLM-built HEA and MM-SLM-built HEA TiNp/HEA using a split Hopkinson pressure bar (SHPB) system, with the strain rates of 1000 s(-1), 2000 s(-1), and 3000 s(-1). The structurally hierarchical HEA TiNp/HEA exhibited higher strength and deformability than the HEA. The strain-ratedependent work hardening capacity and macroscopic plasticity of the HEA TiNp/HEA indicated a better resistance to dynamic shocks. The promising results pave a road for achieving high-performance HEA-based MMCs of the MM-SLM-built hierarchical structures with a relatively low proportion of nano-ceramic reinforcements and bimodal-grained HEA matrix.