文献类型：期刊文献

英文题名：Synergistic improvement of strength and ductility in additively manufactured in-situ phase-transitioned dual-phase hetero-structures

作者：Huang, Guoqing[1,2];Yang, Haitao[1,2];Zhang, Jianrui[1,2];Li, Bo[1,2,3]

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 Equipment, Shanghai 200237, Peoples R China

年份：2026

外文期刊名：MATERIALS RESEARCH LETTERS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001702566200001)】；

基金：This research work is sponsored by the National Natural Science Foundation of China [grant numbers 52205155 and 52175140].

语种：英文

外文关键词：Additive manufacturing; dual-phase heterogeneous structure; numerical simulation; synergistic strength-toughness enhancement

摘要：Laser powder bed fusion additive manufacturing offers unique advantages for constructing dual-phase heterogeneous structural materials. This study employed mechanically mixed powders to successfully fabricate dual-phase heterogeneous alloys exhibiting both high strength and ductility through an in-situ phase transformation strategy. Through combined numerical simulations and experimental characterization, the formation mechanism and evolution patterns of the in situ dual-phase heterogeneous microstructure were systematically elucidated. Crystal plasticity finite element analysis further revealed that the heterogenous deformation-induced strengthening effect constitutes the core mechanism for achieving synergistic enhancement of strength and toughness. This in-situ dual-phase design strategy opens new avenues for developing high-performance metallic materials. [GRAPHICS]