About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior at the Nanoscale VIII
|
| Presentation Title |
New insights into the fracture behavior of multilayered thin films using in-situ microcantilever bending |
| Author(s) |
Balila Nagamani Jaya |
| On-Site Speaker (Planned) |
Balila Nagamani Jaya |
| Abstract Scope |
Design of multilayer thin films of nitrides or oxides requires knowledge of the fracture toughness of individual free-standing layers as well as their fracture toughness in the presence of the second layer. We quantify the modification in the crack driving force due to the elastic-plastic mismatch and residual stresses for a crack to propagate straight into the second layer, or deflect into the interface. Using TiN/Ti, and BaTiO3/Pt-Si and BaTiO3/SrTiO3 as model thin film systems, we systematically investigate the fracture behavior of bi-layers, followed by multilayers with increasing thickness, to determine the change in fracture resistance in the presence of the second layer, as the crack propagates in mode I. In YSZ/steel model coating system, we investigate the fracture resistance as the crack grows along the interface in mixed mode. Finite element simulations coupled with in-situ SEM based microcantilever fracture experiments are used to capture these effects. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Thin Films and Interfaces, Mechanical Properties, Other |