| About this Abstract |
| Meeting |
TMS Specialty Congress 2025
|
| Symposium
|
The 7th International Congress on 3D Materials Science (3DMS 2025)
|
| Presentation Title |
In-Situ Characterization of Martensitic Phase Transformation Interfaces in CuAlNi During Mechanical Cycling Using Dark-Field X-Ray Microscopy |
| Author(s) |
E. Celeste Perez-Valenzuela, Adam Creuziger, Sangwon Lee, Evan Rust, Raquel Rodriguez Lamas, Albert Zelenika, Can Yildrim, Carsten Detlefs, Ashley Bucsek |
| On-Site Speaker (Planned) |
E. Celeste Perez-Valenzuela |
| Abstract Scope |
A reversible martensitic phase transformation is the deformation mechanism behind the functional properties of many multiferroic materials including shape memory alloys. During forward and reverse transformation, interfacial stress fields emerge at phase interfaces, leading to a hysteresis and the formation of undesirable dislocations. Here, we use in-situ dark-field X-ray microscopy (DFXM) to characterize the nucleation and growth of these phase interfaces during mechanical cycling of a CuAlNi shape memory alloy. The results show the 3D emergence and evolution of individual phase interfaces and spatially-mapped orientation and elastic strain, including the interfacial elastic strain fields at the phase interfaces. These findings will contribute to an improved fundamental understanding of the origins of hysteresis and functional fatigue in functional materials that undergo reversible martensitic phase transformations. |
| Proceedings Inclusion? |
Undecided |