| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
100 Years and Still Cracking: A Griffith Fracture Symposium
|
| Presentation Title |
In-situ Fracture along Distinct Interface Types |
| Author(s) |
Michael Burtscher, Markus Alfreider, Michael Wurmshuber, Klemens Schmuck, Helmut Clemens, Svea Mayer, Daniel Kiener |
| On-Site Speaker (Planned) |
Michael Burtscher |
| Abstract Scope |
The determination of fracture processes on micron-scale enables to identify material's shortcomings. Therefore, interfaces within a WCu and an intermetallic TiAl alloy are investigated. By applying continuous stiffness measurement, the fracture toughness, J-integral, and crack propagation within different high-temperature alloys are determined in situ. Hence, fracture behavior of ordered interfaces and large-angle grain boundaries are evaluated and compared with known fracture parameters from the literature. In contrast to macro-mechanic fracture experiments, distinct interfaces are selected within the backscattered contrast of a scanning electron microscope and tested using a picoindenter from type Hysitron PI-85. Therefore, strengthening mechanisms are identified and linked to the presence of precipitates, or other surface modifications along distinct interfaces. Complimentary digital image correlation is used to verify determined crack length and outlines the limitations of the used experimental setup. Based on this, microstructural designs are proposed to enhance the fracture behavior of the alloying systems under investigation. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, High-Temperature Materials, |