文献类型：期刊文献

英文题名：Multi-material laser powder bed fusion (MM-LPBF) additive manufacturing of dual-phase heterostructure steel

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

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 Equipment, Shanghai 200237, Peoples R China;[4]Boside Nantong Intelligent Equipment Technol Co Lt, Nantong 226152, Peoples R China

年份：2025

卷号：61

起止页码：386

外文期刊名：CIRP JOURNAL OF MANUFACTURING SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20252818752434);WOS:【SCI-EXPANDED(收录号:WOS:001538548100001)】；

基金：This research work is sponsored by the National Natural Science Foundation of China (Grant No. 52175140) .

语种：英文

外文关键词：Additive Manufacturing; Multi-material laser powder bed fusion; Bimetallic heterostructure; Dual-phase; Dynamic impact

摘要：The multi-material laser powder bed fusion (MM-LPBF) additive manufacturing technology enables the refined fabrication of artificially designed and spatially ordered integrated structures of multiple metallic materials. Through the screening of dissimilar material matching based on compositional similarity and metallurgical compatibility, three types of the bimetallic integrated bulk materials with heterostructures of staggered multilayer planes, staggered multi-layer chessboards, and staggered multi-layer rotating gratings, respectively, were fabricated via the MM-LPBF using 316 L austenitic stainless steel and 18Ni300 martensitic steel powders as the raw materials. The printed bimetallic configurations present the dual-phase and bimodal structure of finegrained martensite phase, with body-centered cubic (BCC) crystal structure, and coarse-grained austenitic phase, with face-centered cubic (FCC) crystal structure. The dual-phase regions exhibit spatially ordered distributions according to the artificial designs. The interfaces between the dual-phase regions display firmly bonded through the "dual-phase interspersed and mixed" transition form after melting-solidification from the laser molten pool behaviors. The characteristic geometric dimensions of these spatially arranged phase regions from differentiated geometric types vary from 200 to 500 mu m, with dual-phase mixing zones of 100 mu m width as the interfacial regions. Considering the strength-ductility synergy effect of the bimetallic integrated material of the austenitic and martensitic steels, the dynamic impact performances of the heterostructures under different impact strain rate conditions were experimentally verified, showing good impact resistances and energy absorption capacities of these dual-phase, bimodal, and hierarchical heterostructures. This MM-LPBF additive manufacturing path is conducive to the creation of more novel alloy systems with strength-toughness synergy using more integrated dissimilar metallic materials.