About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
Presentation Title |
On the Strain Rate and Temperature Dependence of the Flow Stress Behaviour of DS Nb-Modified Mar-M247 Superalloy |
Author(s) |
Maureen Aceves, Rafaella dos Santos Silva, Carlos Nunes, David Townsend |
On-Site Speaker (Planned) |
Maureen Aceves |
Abstract Scope |
Mar-M247 is a nickel-base superalloy used in turbochargers and in the hot section of turbine jet engines due to its superior creep, oxidation, corrosion, and strength resistance at elevated temperatures. A Nb-modified Mar-M247 superalloy has been produced via directional solidification for evaluation of its mechanical behaviour under axisymmetric compression loading from RT up to 1000oC at two different loading rates: 10-3 s-1 and > 2000 s-1 in a SHPB. Induction heating is used to control the thermal history of the specimen during the test. Scanning electron microscopy techniques are used for microstructural examination to investigate strain evolution and the global deformation as well as local features such as strain localisation. Strain at elevated temperatures is characterised through Digital Image Correlation by using low and ultra-high-speed imaging. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Temperature Materials, Mechanical Properties, Characterization |