About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Advances in Titanium Technology
|
| Presentation Title |
Microstructural evolution and mechanical property enhancement in Ti80(CoFeNi)20 ultrafine eutectic composites via thermal processing |
| Author(s) |
MUHAMMAD AOUN ABBAS, Dilshodbek Yusupov, Ki Buem Kim |
| On-Site Speaker (Planned) |
MUHAMMAD AOUN ABBAS |
| Abstract Scope |
This study explores the impact of thermal processing on phase transformations and microstructural evolution in Ti80(CoFeNi)20 ultrafine eutectic composites. The as-cast alloy exhibited a characteristic hypoeutectic microstructure, comprising β-Ti dendrites and a β-Ti + Ti₂Ni-type ultrafine eutectic matrix. Upon annealing at 1173 K for 1 hour, the microstructure transitioned significantly from a hypoeutectic configuration to a microscale dual-phase structure, characterized by dispersed Ti₂Ni-type phases within a β-Ti matrix. Further aging at 873 K for 1 hour induced a eutectoid decomposition of the β-Ti matrix, resulting in the formation of α-Ti and Ti₂Ni-type phases. These heat treatment-induced microstructural transformations markedly influenced the alloy's mechanical properties. Optimized performance, with a yield strength of 1530 MPa and plasticity of 5.7%, was achieved in the annealed alloy. |