Wire-arc additive manufacturing of TiB/Ti6Al4V composites using Ti-TiB2 cored wire: processing, microstructure and mechanical properties

被引：9
|
作者：
Bao, Yang [1 ]
Huang, Lujun [1 ,2 ]
An, Qi [1 ]
Liu, Yuyang [1 ]
Gong, Delong [1 ]
Cui, Lihua [1 ]
Geng, Lin [1 ,2 ]
Hong, Changqing [3 ]
机构：
[1] Harbin Inst Technol, Sch Mat Sci & Engn, POB 433,. 92 Xidazhi Str, Harbin 150001, Heilongjiang, Peoples R China
[2] Harbin Inst Technol, State Key Lab Precis Welding & Joining Mat & Struc, Harbin, Peoples R China
[3] Harbin Inst Technol, Sch Astronaut, Harbin, Peoples R China
来源：
VIRTUAL AND PHYSICAL PROTOTYPING | 2024年 / 19卷 / 01期
基金：
国家重点研发计划;
关键词：
Wire-arc additive manufacturing; titanium matrix composite; titanium flux-cored wire; microstructure; mechanical properties; MATRIX COMPOSITES; TI-6AL-4V; ALUMINUM; ALLOY; STRENGTH; METAL; AL; NANOCOMPOSITES; FABRICATION; CONVECTION;
D O I：
10.1080/17452759.2024.2383287
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A novel wire-arc additive manufacturing (WAAM) process utilising titanium flux-cored wire (FCW) containing TiB2, Al60V40 and Ti6Al4V powders was proposed for fabricating TiB/Ti6Al4V composites. The FCW exhibited the capability in customising the composition of TiB/Ti6Al4V composites from hypoeutectic to hypereutectic by tailoring the proportion of TiB2 in blended powders. The comprehensive influence of TiB2 content on molten pool flow, compositional homogeneity and porosity of as-printed composites was attributed to the reduction of melt flowability, driven by viscosity escalation. It was unravelled the porosity was the intrinsic deficiency for the FCW-WAAM process, originating from the gases within FCW, while the interlayered TiB clusters were caused by the lagging melt of TiB2 powders. Due to directional solidification, TiB whiskers possessed a large aspect ratio and were partial to upward growth in hypoeutectic composites, which enhanced the load transfer strengthening. However, the porosity degraded the ductility of composites and caused the variation in mechanical performance.
引用
收藏
页数：25
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