About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior at the Nanoscale VIII
|
| Presentation Title |
A spherical nanoindentation LUR approach to study inelastic back strain on a local level |
| Author(s) |
Michael Wurmshuber, Pouya Hassanzadeh Sarhangi, Verena Maier-Kiener, Heinz Werner Höppel, Mathias Göken |
| On-Site Speaker (Planned) |
Michael Wurmshuber |
| Abstract Scope |
Inelastic back strains arise in materials undergoing heterodeformation, where plastic deformation is unevenly distributed across the microstructure. This includes both multiphase materials and conventional polycrystalline metals. To be experimentally measurable, however, the grain or phase sizes must be sufficiently small. Prior work has demonstrated this at the macroscale using loading-unloading-reloading (LUR) tests on ultrafine-grained (ufg) and heterolayered metals. This study advances the approach by characterizing inelastic back strain at the microscale, resolving it locally within the microstructure. A novel spherical nanoindentation-based LUR protocol was developed and applied to a series of homogeneous and heterogeneous cg and ufg metals produced via accumulative roll bonding (ARB). The results offer new insights into local deformation processes and the role of microstructural heterogeneity in shaping inelastic back strain. These findings and their implications for understanding deformation in cg and ufg materials will be presented. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Nanotechnology, |