| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Magnesium Technology
|
| Presentation Title |
E-17: A Parametric Study of the Role of Basal-prismatic <a> Dislocation Interactions in Dynamic Strain Aging in Mg Alloys |
| Author(s) |
Mohammed A. Shabana, Jishnu Bhattacharyya, Sean Agnew |
| On-Site Speaker (Planned) |
Sean Agnew |
| Abstract Scope |
The phenomenon encompassing negative strain rate sensitivity and serrated flow (i.e., dynamic strain aging) is observed in many alloys at a particular range of temperatures and strain rates. This also applies to Mg alloys where the interactions between mobile and forest dislocations are thought to be important in explaining this aspect. In 2004, Picu illustrated a mechanism for the appearance of the negative strain rate sensitivity and applied the mechanism to a parametric study of the Lomer lock case in FCC alloys. In HCP Mg however, locked configurations do not result from interactions between basal and prismatic <a> dislocations. Such interactions can either be collinear (leading to annihilation) or non-collinear (leading to glissile junction formation). These cases in which mobile basal dislocations interact with forest prismatic dislocations and vice versa are discussed in a parametric study along with their effects on dynamic strain aging in Mg alloys. |
| Proceedings Inclusion? |
Planned: |