| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Fracture in Metals: Insights from Experiments and Modeling Across Length and Time Scales
|
| Presentation Title |
The Role of Non-Singular Stresses on the Brittle-to-Ductile Transition |
| Author(s) |
Hunter K. Brumblay, Gregory Thompson, Christopher Weinberger |
| On-Site Speaker (Planned) |
Hunter K. Brumblay |
| Abstract Scope |
The role of non-singular stress fields, including T-stresses, and their role in fracture has been widely discussed in the field of fracture mechanics and such stresses do play a role in size limited samples. However, the role of non-singular stresses in the brittle-to-ductile transition of metals is largely unexplored. In this talk, we examine how these non-singular stresses affect dislocation motion and alter the resistance of fracture, changing the brittle-to-ductile transition and its activation energy. We explore this inter-relationship using discrete dislocation dynamics and a model of a sharp crack to understand how the soft brittle-to-ductile transition changes with the application of non-singular stresses. These results are then able to shed light on experiments that have reported different activation energies in the same material but with different size scales and loading conditions. |