About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Glasses and Optical Materials: Challenges, Advances, and Applications
|
| Presentation Title |
Non-destructive sequential imaging of indentation-induced cracking in oxide glasses by in situ nanotomography |
| Author(s) |
M. Faizal Ussama Jalaludeen, Kritika Singh, Jonas A. Finkler, Johan F. S. Christensen, Soeren S. Soerensen, Menghan Shi, Sidsel M. Johansen, Sudheer Ganisetti, Imke Greving, Morten M. Smedskjaer |
| On-Site Speaker (Planned) |
M. Faizal Ussama Jalaludeen |
| Abstract Scope |
Ex situ observation of contact-induced damage in oxide glasses cannot reveal the cracking events during the indentation cycle, e.g., whether cracks formed during loading or unloading. Moreover, the indentation cracking response of glasses depends on the indentation deformation mechanism, which can be altered by varying the glass composition, processing or testing conditions. Here, we explore the use of non-destructive X-ray nanotomography with in situ indentation for evaluation of indent crack morphologies, to gain information aiding in the design of more damage-resistant glasses. In detail, we investigate the indentation cracking response of glasses with different compositions and microstructures, i.e., both homogeneous and phase-separated glasses. Instead of the conventional approach of optical imaging, we use in situ X-ray nanotomography to spatially resolve, map and quantify the origin and evolution of different cracks at different stages of the quasi-static indentation loading process. |