Microstructure and mechanical properties of laminated Ti-TiBw/Ti composites fabricated by wire arc additive manufacturing

被引：1

作者：

Yi, Xiang ^{[1
]}

Bai, Xingwang ^{[1
]}

Yu, Runyao ^{[1
]}

Zhou, Xiangman ^{[2
]}

Li, Runsheng ^{[3
]}

Li, Fazhi ^{[1
]}

机构：

[1] Univ South China, Sch Mech Engn, Hengyang 421001, Hunan, Peoples R China

[2] China Three Gorges Univ, Coll Mech & Power Engn, Yichang 443002, Hubei, Peoples R China

[3] China Univ Petr East China, Coll Mech & Elect Engn, Qingdao 266580, Peoples R China

来源：

MATERIALS CHARACTERIZATION | 2024年 / 218卷

关键词：

Wire arc additive manufacturing; Microstructure; Mechanical properties; Laminated structure; Flux-cored wires; BEHAVIORS; TENSILE; ARCHITECTURE; DEPOSITION;

D O I：

10.1016/j.matchar.2024.114512

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

To achieve the synergetic improvement of the strength and ductility of titanium matrix composites (TMCs), in this study, flux-cored wires were customized and combined with the wire arc additive manufacturing (WAAM) process to fabricate laminated Ti-TiBw/Ti composites. The diffusion behavior of the reinforcement during the WAAM deposition process was studied in detail. By optimizing the process parameters to regulate the distribution of the reinforcement, the composites presented a laminated structure on the macroscale and a nonuniform distributed network structure on the microscale. Compared with pure titanium, the ultimate tensile strengths and ductility of the laminated Ti-TiBw/Ti composites have both improved. The ultimate tensile strengths of the composites with 5 vol% and 10 vol% TiBw/Ti layers are 574 MPa and 663 MPa, respectively, and the fracture elongation are 27.74 % and 24.95 %, respectively. This heterogeneous structure of TMCs reconciles the contradiction between strength and ductility, mainly attributed to the strengthening effect of in-situ synthesized TiBw and the toughening effect of the laminated structure and the TiBw network structure.

引用

页数：12

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