| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Solid-state Processing and Manufacturing for Extreme Environment Applications: Integrating Insights and Innovations
|
| Presentation Title |
High Strength and Wear Resistance Al-TiB2 Composite Fabricated via Friction Consolidation |
| Author(s) |
Xiao Li, Hrishikesh Das, Mayur Pole, Lei Li, Ayoub Soulami, Glenn J J Grant, Darrell R Herling, Mert Efe |
| On-Site Speaker (Planned) |
Xiao Li |
| Abstract Scope |
Friction consolidation (FC) is a novel method to make bulk-size metal matrix composite with uniform dispersion. In this work, AA7075 with 12 and 24 vol% of titanium diboride (TiB2) composite discs were made via FC. The consolidated discs have uniform dispersion of submicron- and micron-sized TiB2 particles with significantly refined aluminum grain and particle sizes. Compared to the base metal, the composite has improved hardness by up to 50%, Young’s modulus by up to 62%, and ultimate tensile strength by up to 28% to 672 MPa, while reducing ductility by 80%. The wear rate of 7075/24vol% TiB2 improves seven-fold compared to base metal, making it comparable to carburized steels. Microstructure-based finite element modeling provided a theoretical strength limit of ~730 MPa for the composites and indicated that high triaxiality in conjunction with severe equivalent plastic strain led to early fracture initiations and reduced ductility. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Composites, Process Technology, Mechanical Properties |