| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Temperature Creep Properties of Advanced Structural Materials
|
| Presentation Title |
A Microstructure Sensitive Model to Account for the Non-isothermal Creep Behavior of Ni-based Single Crystal Superalloys |
| Author(s) |
Jonathan Cormier |
| On-Site Speaker (Planned) |
Jonathan Cormier |
| Abstract Scope |
Nickel-based single crystal superalloys are widely used for the design of aeronautic and industrial gas turbine blades and vanes due to their superior mechanical properties especially in creep up to 1,100°C. A reliable design of these components against creep deformation should take into account all creep stages, creep anisotropy and degradation of the microstructure occurring not only during high temperature creep (rafting) but also during non-isothermal transients. Microstructural parameters are γ' morphology and dislocation structures.
The **POLYSTAR** model was developed to fulfill these requirements. New internal variables were introduced in a crystal plasticity framework to take into account microstructure evolutions such as γ' dissolution/precipitation and dislocation recovery processes, and their effects on the creep behavior and creep life.
In this presentation, the development of this model will be recalled and examples of engine-like tests (i.e. certification tests) performed on test-bars will be presented to assess the model. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Mechanical Properties, Modeling and Simulation |