|About this Abstract
|2023 TMS Annual Meeting & Exhibition
|Phase Transformations and Microstructural Evolution
|Effect of β-stabilizer Elements on the α-β Interfacial Structure and Energies Using First-principles Calculations
|Maheshwari Meesa, Michael I Baskes, Rajarshi Banerjee, Srinivasan G Srivilliputhur
|On-Site Speaker (Planned)
Titanium alloys, especially dual phase (α+β) alloys, such as Ti6Al4V, exhibit an excellent balance of mechanical properties and hence are commonly used as structural materials. During thermo-mechanical processing the α-phase forms from the parent high temperature β phase, with the α-β interfaces exhibiting the Burgers Orientation Relationship (OR). The defect-structure, energetics, and the role of β stabilizers(e.g V, Nb) on these interfaces are difficult to determine solely from experiments. Hence, first principles calculations have been used to study these interfaces assuming a random distribution of the β stabilizers. But in reality, the equilibrium concentration of the β stabilizers vary in the α and β phases. This work investigates the effect of concentration and distribution of the β stabilizing elements among the α and β phases and the interface on the interfacial energy and structure of the system using a Monte Carlo method using energies derived from first principles calculations.
|Titanium, Other, Other