| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Light Alloys, Advanced Forming Processes and Characterization
|
| Presentation Title |
Solute Clustering Effects on the Microscopic Deformation Behavior of Al-Zn-Mg-Cu Alloys |
| Author(s) |
Hyokyung Sung, Saif Haider Kayani, Won-Seok Ko, Hyunjoo Choi, Jae Bok Seol, Jung Gi Kim |
| On-Site Speaker (Planned) |
Hyokyung Sung |
| Abstract Scope |
The micro- and macro-deformation behaviors of Al-Zn-Mg-Cu alloys have been investigated to reveal the influence of solute clusters on mechanical properties under various microstructural types. The co-existence of nanoscale solute clusters and excess solute atoms in Al-Zn-Mg-Cu alloys can enhance strength without sacrificing the ductility of single-crystal micropillars and bulk nanocrystalline metallic materials. The excess solute atoms in the alloy interact with dislocations during plastic deformation, bringing positive effects on the strain hardening rate. Microscopic deformation behaviors in micropillars are analyzed by the crystal plasticity finite element model and molecular dynamics simulations. Differences between single and multiple slip modes under various grain orientations were also discussed, focusing on dislocation motion affected by solute clusters and excess solute atoms. |