About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Symposium
|
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Presentation Title |
CalPhaD Method Contribution to Optimize Heat Treatments
on a Ti-6Al-4V Additive Manufactured Alloy |
Author(s) |
Christophe Voltz, François Buy, Benoît Bourton, William Mottay |
On-Site Speaker (Planned) |
Christophe Voltz |
Abstract Scope |
Additive manufacturing (AM) process is accompanied by a wide range of specific metallurgical microstructures due to high cooling rates and thermal gradients. Thermal post treatments are applied to obtain the desired mechanical properties.
In the case of Ti-6Al-4V titanium alloy, we apply the CalPhaD method to understand the effect of a subsequent heat treatment on the microstructure. This alloy is composed of two phases: hcp α-phase and bcc β-phase contributes to the stability of the alloy. The morphology and composition of these two phases depend both on the composition in minor alloying elements and cooling rate. The study focusses how elements as iron or nitrogen affect transus temperature. The developed approach uses solutions to the one-dimensional, diffusion controlled moving boundary problem to predict metastable phase composition and the size of metallurgical features that occur upon cooling. The simulation results are compared with experimental data stemming from thermal treatments. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |