| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing of Titanium-based Materials: Processing, Microstructure and Material Properties
|
| Presentation Title |
Studying Nanoscale Ti5Si3 Quasi-continuous Network in the Selective Laser Melted Titanium Matrix Nanocomposites |
| Author(s) |
Dian Li, Xing Zhang, Sydney Fields, Rongpei Shi, Yiliang Liao, Yufeng Zheng |
| On-Site Speaker (Planned) |
Yufeng Zheng |
| Abstract Scope |
Titanium matrix nanocomposites (TMNC) with Ti5Si3 network benefit from high specific strength, excellent corrosion resistance, and great high-temperature tolerance. However, additively manufactured TMNC experience the limitations of large columnar beta grains and microscale Ti5Si3 network. In this work, a type of nanoscale Ti5Si3 reinforced TMNC using selective laser melting (SLM) was fabricated with SiC nanoparticle-mediated in-situ approach, and its microstructure was investigated using correlative three-dimensional (3D) focus ion beam-scanning electron microscopy (FIB-SEM) tomography and transmission electron microscopy. The microstructure in the as-built sample was studied using scanning electron microscopy, electron backscattered diffraction, and transmission electron microscopy. The sub-micron scale quasi-continuous Ti5Si3 network was revealed for the first time using the 3D FIB-SEM tomography. Ultra-high microhardness is achieved, significantly higher compared with the SLMed pure Ti. This work is supported by the National Science Foundation, grant CMMI-2122272. |