| About this Abstract |
| Meeting |
13th International Conference on the Technology of Plasticity (ICTP 2021)
|
| Symposium
|
13th International Conference on the Technology of Plasticity (ICTP 2021)
|
| Presentation Title |
The Evolution of Deformation Microstructures and Strain Hardening during Constrained Sliding with Implications for Metal Forming and Cutting Processes |
| Author(s) |
Darcy Anne Hughes |
| On-Site Speaker (Planned) |
Darcy Anne Hughes |
| Abstract Scope |
A novel apparatus to constrain and extremely deform the subsurface of a metal work piece during sliding was utilized to create an unprecedented average size (crystallite) scale of five nanometers with a high dislocation density near the surface. The depth and degree of subsurface deformation was quantitatively measured and statistically analyzed using high resolution transmission and scanning electron microscopy. Scaling and the principal of grain subdivision enabled a direct link between the deformation microstructure that was graded in size scale with increasing depth below the surface and the decreasing stress and strain. Dislocation mechanisms were demonstrated to dominate the deformation. These observations and analyses indicate that metals and alloys under constrained conditions may continuously refine their size scale and strain-harden. As a result the degree and depth of the deformation, which extends in depth twenty to eighty times the ridge height, far exceeds existing models and wedge experiments. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |