Mathematical Modeling Applying ν Concept and θ Projection to Creep of Ti-6Al-4V Alloy

The current materials research field demands sophisticated tests and simulations to predict creep behavior, meet design needs, and save time and resources. This demands an appropriate mathematical formalism that can represent creep data for different materials and loading conditions. In this context, mathematical models such as θ-Projection and ν Concept can be applied to predict the behavior of materials under creep conditions. The main goal of this study involves the application of such methodologies to predict a creep curve for Ti-6Al-4V. In a preliminary assessment, both equation parameters, determined by computational techniques and an experimental database, enabled the determination of the strain-time curve of Ti-6Al-4V at 465 MPa and 500 ºC. The analysis showed that both methods have acceptable accuracy to predict primary, secondary, and tertiary creep behavior for Ti-6Al-4V. However, results indicated that the ν Concept produced a creep curve with better agreement with the experimental data. The technique used for obtaining parameters is promising and should be improved for future research.

Keywords:
Creep; Ti-6Al-4V; Mechanical behavior; Materials characterization; Mathematical modeling