| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Nix Award and Lecture Symposium: Nanomechanics and Mechanomaterials
|
| Presentation Title |
2022 William D Nix Award Lecture: Mechano-materials: Engineering Mechanical Properties of Materials with Internal Interfaces and Lightweight Structures |
| Author(s) |
Huajian Gao |
| On-Site Speaker (Planned) |
Huajian Gao |
| Abstract Scope |
While conventional mechanics of materials offers passive access to mechanical properties of materials in existing forms, a paradigm shift is emerging towards proactive design of material properties/functionalities by leveraging the force-geometry-property relationships. Such an emerging field can be coined as “mechano-materials”. In this talk, we discuss a couple of examples of mechano-materials research. The first example is concerned with a nature-inspired design of fatigue resistant metals with internal interfaces. We report a history-independent and stable cyclic response in bulk copper samples with microstructures mimicking the highly oriented nanoscale twin boundaries in conch shells. We demonstrate that this unusual cyclic behaviour is governed by an unusual type of dislocations called correlated ‘necklace’ dislocations (CNDs). The second example has to do with the design, fabrication and mechanics of 3D nanolattices with octet- and iso-truss topologies, achieving unprecedent mechanical properties such as specific strength, superior fracture strains and insensitivity to fabrication-induced defects. |
| Proceedings Inclusion? |
Planned: None Selected |