| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advancing Current and State-of-the-Art Application of Ni- and Co-based Superalloys
|
| Presentation Title |
Considerations for Homogenizing Alloys |
| Author(s) |
Paul D. Jablonski, Jeffery Hawk |
| On-Site Speaker (Planned) |
Paul D. Jablonski |
| Abstract Scope |
Chemical inhomogeneities result naturally as a by-product of alloy solidification. Thermal or thermo-mechanical treatments are often used to reduce these inhomogeneities. The question remains exactly how to achieve this and to what level. Traditionally, the homogenization heat treatment is based upon past practice on related alloys or trial and error laboratory experiments. If the chemical inhomogeneity profile is known a-priory, kinetic modeling software such as DICTRA (Diffusion Controlled TRAnsformations) can be used to model the homogenization kinetics of an alloy. In this study, the Scheil module within the Thermo-Calc software was used to predict the as-cast segregation of alloys. The segregation profiles were determined based on the remaining liquid chemistries and were read into DICTRA to refine the homogenization heat treatment. The thermodynamic and kinetic modeling of the computationally predicted heat treatment, and subsequent experimental verifications on real castings is presented along with a set of decision criteria. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |