Wire-arc additive manufacturing of TiB/Ti6Al4V composites using Ti-TiB <sub>2</sub> cored wire: processing, microstructure and mechanical properties
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.
Authors
- Yang Bao (ORCID: https://orcid.org/0009-0007-6605-8730)
- Lujun Huang (ORCID: https://orcid.org/0000-0002-2542-0605)
- Yuyang Liu (ORCID: https://orcid.org/0000-0002-7320-1300)
- Lin Geng (ORCID: https://orcid.org/0000-0001-6403-1672)
- Qi An (ORCID: https://orcid.org/0000-0002-6231-5863)
- Lihua Cui (ORCID: https://orcid.org/0000-0003-2817-2819)
- Delong Gong
- Changqing Hong
Institutions
- Harbin Institute of Technology (CN)
Publication Details
- Journal
- Virtual and Physical Prototyping
- Published
- 2024-08-05
- DOI
- https://doi.org/10.1080/17452759.2024.2383287
- Citations
- 20
- Primary Topic
- Additive Manufacturing Materials and Processes
- Type
- article
- Field-Weighted Citation Impact
- 4.25
Funders
- National Natural Science Foundation of China
- National Key Research and Development Program of China