About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
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Mechanics at the Extremes: Bridging Length-Scales From Nanoscale to Bulk
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| Presentation Title |
Linking interfacial properties with macroscopic behavior in stress-induced martensitic phase transforming materials using dark-field x-ray microscopy |
| Author(s) |
Sangwon Lee, E. Celeste Perez, Janice Moya, Can Yildirim, Carsten Detlefs, Othmane Benafan, Evan Rust, Adam Creuziger, Ashley N. Bucsek |
| On-Site Speaker (Planned) |
Ashley N. Bucsek |
| Abstract Scope |
This presentation explores the use of dark-field x-ray microscopy (DFXM), a diffraction microstructure imaging technique, to shed new light on the mechanical behavior of martensitic phase transforming materials. By imaging while in the diffraction condition, DFXM enables strain, orientation, and phase mapping with spatial resolutions on the order of 100 nm, resulting in the capability to resolve fine microstructure features such as interfaces. Moreover, DFXM can be performed in situ, on bulk materials, and in 3D. Applied to martensitic phase transformations, the result is a look into evolving 3D martensitic microstructures during stress-induced transformation, including austenite-martensite interfaces, interfacial stress fields, and dislocations. Here, we discuss the application of these techniques to Ni-Ti-Pd shape memory alloys during tensile loading and unloading. The results reveal differences in martensite morphology and interfacial stresses in cubic-to-orthorhombic versus cubic-to-monoclinic Ni-Ti-Pd shape memory alloys that are closely linked to differences in macroscopic hysteresis and functional fatigue. |
| Proceedings Inclusion? |
Planned: |