About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Deformation and Damage Mechanisms of High Temperature Alloys
|
Presentation Title |
Grain Scale Deformation Study of a Nickel-based Superalloy under Thermo-mechanical Fatigue Utilizing Crystal Plasticity Simulations and High-energy X-ray Diffraction Microscopy |
Author(s) |
Brandon T. Mackey, Ritwik Bandyopadhyay, Sven E. Gustafson, Michael D. Sangid |
On-Site Speaker (Planned) |
Brandon T. Mackey |
Abstract Scope |
Nickel-based superalloys are used for applications in the hot sections of gas turbines because of their high strength at elevated temperatures. These materials are subjected to complex thermo-mechanical loading due to service conditions which leads to thermo-mechanical fatigue (TMF) failure. The failure mechanisms associated with TMF are dependent on microstructural characteristics and parameters such as temperature, strain range, and strain-temperature phasing. Using microstructural information reconstructed from a high-energy X-ray diffraction microscopy (HEDM) TMF experiment, we generate a temperature-dependent crystal plasticity model for LSHR, a Nickel-based superalloy, to study failure mechanisms associated with TMF. HEDM grain average metrics at unique loading steps are compared to the crystal plasticity model to identify both the model and experimental capabilities associated with TMF. This framework provides the ability to pinpoint complex thermo-mechanical failure mechanisms at the grain scale. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, High-Temperature Materials, ICME |