About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Material Responses Investigated Through Novel In-Situ Experiments and Modeling
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| Presentation Title |
In-Situ Ultrasonic Mapping of Phase Transformation Behavior in NiTi Shape Memory Alloys |
| Author(s) |
Olivia J. Cook, Andrea P. Argüelles |
| On-Site Speaker (Planned) |
Olivia J. Cook |
| Abstract Scope |
Current characterization methods for martensitic phase transformations in shape memory alloys such as differential scanning calorimetry are unable to capture spatial variations within larger components. While ultrasonic wave speed measurements have detected these transformations, existing approaches lack the spatial resolution and necessary analytical framework to quantitatively assess transformation kinetics across bulk specimens. This study introduces spatially-resolved ultrasonic mapping of thermal phase transformations in NiTi specimens using a temperature-controlled immersion fluid. The methodology provides real-time spatial visualization of martensitic transformation progression between parent and product phases, revealing heterogeneous behavior in wrought specimens. Analytical modeling grounded on ultrasonic scattering in polycrystalline microstructures enables quantitative interpretation of the spatially-varying data and associated transformation kinetics. This integrated approach addresses critical gaps in process-structure-property relationships by determining whether small-scale specimen behavior represents bulk material response. Findings could impact shape memory alloy manufacturing and fabrication of heterogeneous components with tailored properties. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Phase Transformations, Other |