About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Lightweight Composites, Materials & Alloys
|
| Presentation Title |
Mechanical and Microstructural Behavior of Friction Stir Powder Additive Manufactured Ceria-Stabilized Zirconia and Polymer-Derived Ceramic Reinforced AA7075 Composites |
| Author(s) |
Nisar Ahamad Khan, Ajay Kumar |
| On-Site Speaker (Planned) |
Nisar Ahamad Khan |
| Abstract Scope |
This study investigates ceria-stabilized zirconia and polymer-derived ceramic-reinforced AA7075 composites manufactured using the friction stir powder additive manufacturing (FSPAM) process. Microstructure confirmed a uniform, defect-free deposition having fine grains of size 6.4 ± 2.9 µm and 58% high-angle grain boundaries, indicating significant grain refinement due to dynamic recrystallization. The reinforcement particles refined the microstructure through the Zener pinning effect, while η and S precipitates (~45 nm size) enhanced mechanical strength by inhibiting grain coarsening. The composite exhibited a yield strength of 223 ± 7 MPa, an ultimate tensile strength of 393 ± 3 MPa, a microhardness of 123 ± 9.9 HV, and an elongation of 5.5 ± 0.4%, closely matching AA7075-T4 alloys. These findings highlight FSPAM as a promising process in solid-state AM of Al-based composites for high-strength and high-temperature applications. However, further research is needed to address geometric constraints for broader industrial adoption. |