About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
In Tribute to Robert Wagoner: A Pioneer in Metal Forming and Constitutive Modeling
|
| Presentation Title |
The Role of Grain Boundaries in the Development of Internal Stresses in Metals |
| Author(s) |
David T. Fullwood, Eric R Homer, Guowei Zhou |
| On-Site Speaker (Planned) |
David T. Fullwood |
| Abstract Scope |
Internal stresses in metals contribute to such phenomena as the Bauschinger and Hall-Petch effects, anelasticity and springback. Grain boundaries (GBs) often play a critical role in the development of such stresses during deformation. This paper reviews the journey that the authors undertook with Rob Wagoner as they sought to predict the influence of GBs on the resulting local stresses, and on the ensuing macroscopic behavior of the material. Experimental tools, such as high-resolution digital image correlation and EBSD were combined with atomistic-scale and meso-scale simulations to try and tease out correlations. To-date, there is no simple principle relating GB character (as defined in a 5D geometrical sense) and stress required to push a dislocation through the GB, making accurate internal stress determination at the sub-grain level difficult. Nevertheless, progress has been made in terms of modeling some of the peculiar behaviors stemming from internal stress evolution. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Characterization, Mechanical Properties |