About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Purveyors of Processing Science and ICME: A SMD Symposium to Honor the Many Contributions of Taylan Altan, Wei Tsu Wu, Soo-Ik Oh, and Lee Semiatin
|
Presentation Title |
Microstructure Control of Nickel based Superalloy Forgings: a Focus onto Post-dynamic Evolutions |
Author(s) |
Nathalie Bozzolo, Marc Bernacki |
On-Site Speaker (Planned) |
Nathalie Bozzolo |
Abstract Scope |
Microstructure evolution during forging is often considered to be a dynamic process, and described with regards to the applied thermomechanical processing parameters. When dealing with large components, cooling after forging is necessarily rather slow, and allows for post-dynamic evolutions which can drastically change the microstructure.
Mechanisms and kinetics of post-dynamic evolutions are highly sensitive to temperature of course, but also to the formerly applied strain rate, and to the recrystallization fraction achieved dynamically (and thus to the strain level). This all will be discussed based on finely controlled experiments showing i) that post-dynamic recrystallization can be an extremely fast process, and ii) that it can be the only remaining recrystallization mechanism when increasing strain rate. The possibility of simulating both dynamic and post-dynamic evolutions using full field finite element models will be addressed as well. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |