About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
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Bridging Scales: Deformation and Damage Mechanisms in Microstructurally and Compositionally Complex Metallic Alloys
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| Presentation Title |
Multi-Scale Investigation of Strain Localization in Hot-Rolled Superelastic Nitinol |
| Author(s) |
Aref Golsorkhi, Dinc Erdeniz |
| On-Site Speaker (Planned) |
Aref Golsorkhi |
| Abstract Scope |
Nickel–titanium alloys have remarkable mechanical properties, including superelasticity and shape memory characteristics, which make them highly desirable for practical applications. In this research, hot-rolled superelastic NiTi sheets underwent tensile tests utilizing a digital image correlation (DIC) enabled scanning electron microscope. Before testing, the grain structure was analyzed using electron backscatter diffraction to establish a microstructural baseline. The interplay between deformation and grain morphology is revealed by high-resolution DIC, which provides localized strain mapping at the microscale. Complementary experiments were done on larger samples utilizing macro-scale DIC to capture global strain responses. The impact of nano-sized Ni4Ti3 precipitates on the mechanical properties of NiTi sheets was assessed by correlating micro- and macro-scale measurements. The findings highlight the influence of precipitate distribution and texture on strain localization, deformation heterogeneity, and overall superelastic performance. This multi-scale DIC methodology offers enhanced understanding of the correlation between microstructure and functional properties in NiTi alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Mechanical Properties, Titanium |