About this Abstract |
Meeting |
TMS Specialty Congress 2025
|
Symposium
|
The 7th International Congress on 3D Materials Science (3DMS 2025)
|
Presentation Title |
Investigating Martensitic Phase Transformations in CuAlNi and NiTi Shape Memory Alloys With In-Situ X-Ray Topotomography |
Author(s) |
Janice Moya, Wolfgang Ludwig, Timothy Thompson, Jonathan Wright, James Ball, Adam Creuziger, Ashley Bucsek |
On-Site Speaker (Planned) |
Janice Moya |
Abstract Scope |
To investigate reversible martensitic phase transformations in shape memory alloys (SMAs), this work leverages in-situ X-ray topotomography and diffraction contrast tomography measurements during mechanical cycling on copper-aluminum-nickel (CuAlNi) and nickel-titanium (NiTi) SMAs on beamline ID11 at the European Synchrotron Radiation Facility. These techniques are essential for uncovering microstructural mechanisms driving martensite transformations, specifically testing variant selection theories and observing interactions that guide transformation pathways. Topotomography allows for high spatial resolution imaging of the 3D morphology of austenite-martensite microstructures as they evolve during mechanical loading. This technique captures interactions between the formation of martensite and important microstructural features, including the nucleation of specific martensite variants at triple junctions, martensite interactions between neighboring grains across grain boundaries, and the formation of multiple, intersecting martensite variants. This work also aims to refine current reconstruction methods to improve martensite contrast in 2D projections and tomographic reconstructions, further advancing our understanding of complex SMA microstructures. |
Proceedings Inclusion? |
Undecided |