About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Deformation Mechanisms, Microstructure Evolution, and Mechanical Properties of Nanoscale Materials
|
Presentation Title |
Dislocation Twin Boundary Interactions: Slip Transfer and Dislocation Nucleation |
Author(s) |
Christoph Kirchlechner |
On-Site Speaker (Planned) |
Christoph Kirchlechner |
Abstract Scope |
Nanotwinned materials are known for their high strength and ductility.
In this work we will use introduce micro pillar compression as well as spherical nanoindentation experiments to highlight two aspects of the strength of microstructures with twin boundaries:
(i) In the first part of the talk the interaction of dislocations with single and multiple coherent Sigma 3 twin boundaries in copper will be shown. Aspect as slip compatibility, slip transfer mechanisms and their quantitative impact on strength will be discussed.
(ii) In the second part of the talk, the important role of pre-existing defects at twin boundaries for dislocation nucleation and the effect of stacking fault energy on dislocation emission from imperfections at the twin boundary will be discussed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Copper / Nickel / Cobalt, Characterization |