| About this Abstract |
| Meeting |
2019 TMS Annual Meeting & Exhibition
|
| Symposium
|
Gamma (FCC)/Gamma-Prime (L12) Co-Based Superalloys III
|
| Presentation Title |
Crystal Plasticity Finite Element Approach to Modeling the Creep Behavior in Cobalt-based Superalloys |
| Author(s) |
Shahriyar Keshavarz, Andrew Reid, Eric Lass, Carelyn Campbell |
| On-Site Speaker (Planned) |
Shahriyar Keshavarz |
| Abstract Scope |
In this study, a Crystal Plasticity Finite Element (CPFE) model is proposed to model creep behavior of single crystalline of Co-based superalloys. The CPFE model uses a homogenized multi-scale approach to consider the effect of morphology including shape, size and volume fraction of precipitates. On the other hand, the constitutive model is composition dependent, and can be used to design the next generation of these alloys. The main dislocation mechanism to model creep is climb of dislocations in the channel when the escape and trap model is used. In this model, the rates of this mechanism are calculated at the interfaces of matrix and precipitates inside the channel. The homogenized activation energy-based constitutive model incorporates an evolving thermal shear resistance as well as an athermal shear resistance due to plastic deformation. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |