Executive Summary : | Ti alloys, particularly the Ti-6wt.%Al-4wt.%V (Ti64) system, are widely used due to their lightweight and strength properties. However, traditional casting methods face challenges like segregation and heterogeneity in microstructure. Direct energy deposition (DED) techniques offer advantages in part repairing and flexibility in alloy design. DED allows for a wider alloy space in different Ti alloy systems, achieving better homogeneity in microstructure. However, strict environment control is required during operation, limiting research on new alloy spaces in Ti-based systems.
Additions of Fe, Cu, Nb, and Co to Ti64 can enhance the strength and ductility of Ti64 alloys. Cu's anti-bacterial property makes it a potential alloying element for bio-implants. Nb's improved mechanical properties and bio-compatibility require more detailed study via DED. Co's addition to Ti-Fe-based systems significantly enhances ductility and wear properties. The project aims to explore newer alloy spaces in different Ti alloy systems (Ti64-Fe-Cu, Ti64-Fe-Nb, and Ti64-Fe-Co systems) based on Ti64-Fe with alloying additions of Cu, Nb, and Co. |