About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fracture and Deformation Across Length Scales: Celebrating the Legacy of William Gerberich
|
| Presentation Title |
Stress-Strain Relationship of Carbamazepine form III: From Nanoindentation to Micropillar Compression |
| Author(s) |
Sushmita Majumder, Mauricio De Leo, Vikram Chandrashekhar Joshi, Changquan Calvin Sun, Nathan A. Mara |
| On-Site Speaker (Planned) |
Sushmita Majumder |
| Abstract Scope |
The mechanical deformation behavior of molecular crystals remains poorly understood despite its critical importance for industrial applications including pharmaceutical manufacturing, energetic materials, and flexible electronics. Understanding elastic-plastic transitions provides valuable insights into yield strength and slip system activation mechanisms that govern crystal behavior under stress. This study investigates the stress-strain relationship of carbamazepine form III through multi-scale mechanical testing approaches. Spherical nanoindentation stress-strain experiments were conducted using probes with radii of 1, 5, and 50 μm to examine contact-scale deformation mechanisms and capture both elastic and plastic behaviors. Results demonstrate a clear correlation between probe size and slip activity discretization, with larger probes exhibiting increasingly discrete slip events during deformation. Complementary in-situ SEM micropillar compression tests using a 20 μm diameter flat punch probe provide real-time visualization of deformation processes, revealing how length scale fundamentally affects mechanical response characteristics. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Mechanical Properties, Other |