Achieving superior strength-ductility in TiBw/Ti-6Al-4V composites via in-situ Ti2Ni nano-precipitation

Author Identifier

Lai Chang Zhang: https://orcid.org/0000-0003-0661-2051

Document Type

Journal Article

Publication Title

Journal of Alloys and Compounds

Volume

1016

Publisher

Elsevier

School

Centre for Advanced Materials and Manufacturing / School of Engineering

Funders

National Natural Science Foundation of China (52271138, 52271108) / Shaanxi Youth Star Program of Science and Technology (2025KJXX-095) / Key Research and Development Projects of Shaanxi Province (2023-YBGY-433, 2024GX-YBXM-356) / Xi'an Talent Program Young Innovative Talents (XAYC 2023030) / Natural Science Foundation of Shanghai (21ZR1445100) / Foundation of Xi’an Key Laboratory of High-Performance Titanium Alloy (NIN-HTL-2022–02)

Comments

Tuo, J., Dong, L., Wang, G., Zhang, X., Zhang, Z., Li, X., ... & Zhang, L. C. (2025). Achieving superior strength-ductility in TiBw/Ti-6Al-4V composites via in-situ Ti2Ni nano-precipitation. Journal of Alloys and Compounds, 1016. https://doi.org/10.1016/j.jallcom.2025.178871

Abstract

The pursuit of enhanced strength and ductility in Ti alloys and their composites represents a significant goal and formidable challenge in the realm of engineering applications. Herein, we have designed and fabricated a novel Ti2Ni nano precipitates reinforced TiBw/Ti-6Al-4V composites with superior strength and ductility using spark plasma sintering and hot rolling technology. The microstructure of the composite contains equiaxial α-Ti phase and β-Ti phase, with the in-situ synthesized TiBw distributed along grain boundaries, and nano-scaled Ti2Ni precipitates distributed in the β-Ti phase. The (TiBw+Ti2Ni)/Ti-6Al-4V composite exhibits an ultimate tensile strength of 1469 MPa, which is 1/4 higher than that of the Ti-6Al-4V alloy (1158 MPa), and even superior to that of many wrought high-strength Ti alloys and composites, while it still remains an elongation of 6.4 %. This superior mechanical property is mainly attributed to significant grain-refinement strengthening and precipitation strengthening induced by Ti2Ni nano precipitates. This work proposes a new approach to achieve a good balance between the strength and ductility of titanium matrix composites.

DOI

10.1016/j.jallcom.2025.178871

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