| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Advanced Characterization of Materials for Nuclear, Radiation, and Extreme Environments V
|
| Presentation Title |
Formation and Recover of Dislocations Under Deformation and/or Irradiation of Elemental Tantalum, a Step Toward Understanding Complex BCC Alloys. |
| Author(s) |
Donald W. Brown, Laurent Capolungo, Bjorn Clausen, Kohnert Aaron, Reeju Pokharel, Dan Savage |
| On-Site Speaker (Planned) |
Donald W. Brown |
| Abstract Scope |
Microstructure-aware models are necessary to predict mechanical properties of materials in environmental conditions such as those observed in nuclear reactors. Dislocations, whether formed through deformation or irradiation, play a controlling role in the mechanical properties of metals by increasing the flow strength and decreasing the strain to failure. Thus, it is important to develop physics-based models of the formation and recovery of dislocations under these distinct conditions. Elemental tantalum provides a relatively simple BCC system in which to develop a microstructural understanding of deformation and recovery processes which can then be applied to a much more complicated and more relevant BCC steel alloys. In-situ neutron diffraction experiments have been completed during deformation and recovery of both virgin and irradiated tantalum to monitor the evolution of the microstructure. Attention will be paid, in particular, to the kinetics of the recovery of dislocations formed through deformation and through irradiation. |