| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Neutron and X-ray Scattering in Materials Science and Engineering
|
| Presentation Title |
The Role of Annealing and Grain Boundary Controls on the Mechanical Properties of Limestones, Marbles and Novaculite |
| Author(s) |
Lawrence Michael Anovitz, Rui Zhang, Paul A Bosomworth, Juliane Weber, Jan Ilavsky, Si Athena Chen, Elliot Paul Gilbert, Jitendra Mata, Mark L Rivers, Peter J Eng |
| On-Site Speaker (Planned) |
Lawrence Michael Anovitz |
| Abstract Scope |
Chemical and mechanical processes are coupled in many geological and geochemical environments. Reactive processes anneal defects and restructure grain boundaries, modifying their elastic properties, levels of internal friction, wave propagation rates and fracture behaviors. The nature of these changes is, however, contingent on the initial state of the rock. In this study, impulse excitation was used to measure changes in mechanical properties as a function of dry and steam heating time at 300 ºC for three carbonate rocks and three silicates. This was coupled with small-angle X-ray and neutron scattering to determine the relationship between changes in bulk mechanical and microstructural properties. An observed decrease in both the Young’s and shear moduli in the experimental limestones as a function of heating time reflects a reduction in stiffness due to annealing. Changes in internal friction reflect both annealing and grain boundary dissolution driven by steam condensation in the confined grain-boundary environment. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Characterization, Other |