| About this Abstract |
| Meeting |
Materials Science & Technology 2012
|
| Symposium
|
Multifunctional Materials for Aerospace and Defense: Challenges and Prospects
|
| Presentation Title |
Substructural Observations in Magnesium |
| Author(s) |
Benjamin M. Morrow, Ellen K. Cerreta, Rodney J. McCabe, Carlos N. Tome |
| On-Site Speaker (Planned) |
Benjamin M. Morrow |
| Abstract Scope |
Magnesium is an important structural material, and the mechanical properties of the metal rely heavily on both the slip and twinning behavior during deformation. To fully understand this behavior, it is necessary to characterize the interactions between dislocations and twins, and the impact of these interactions on subsequent deformation. Additionally, these interactions may have implications towards detwinning, an important component to fatigue behavior. Both in-situ and ex-situ (post-mortem) transmission electron microscopy (TEM) techniques are utilized to characterize twins; dislocations both internal and external to twins; stacking faults internal to twins; and dislocation-twin and twin-twin interactions. In-situ tensile specimens were used to directly observe substructural evolution during straining. Post-mortem TEM was performed on samples compressed in an orientation favorable for {10-12} twinning to completely characterize the resulting microstructure. A more complete understanding of the substructural evolution during deformation may improve future efforts to model material behavior. |
| Proceedings Inclusion? |
Undecided |