About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Heterostructured and Gradient Materials (HGM V): New Mechanistic Discoveries Enabling Superior Properties
|
Presentation Title |
Influence of Strain Gradients in Heterostructured Nanomaterials |
Author(s) |
Daniel Goodelman, Andrea M Hodge |
On-Site Speaker (Planned) |
Daniel Goodelman |
Abstract Scope |
Heterostructured nanomaterials are a promising solution for optimizing strength-ductility synergy, due to hard and soft domains that deform at different rates. Recently, we developed heterostructured Inconel 725 films with complex microstructures after heat treatment. Features including abnormally large grains, nanocrystalline and nanotwinned regions, as well as delta phase, rafted structures, and precipitates were observed. The strain gradient in the film appears to drive the mechanisms that lead to such complex microstructures, although these effects are not yet fully understood. In this work, nanotwinned Inconel 725 films were synthesized using magnetron sputtering, where variations in the deposition conditions contribute to differences in the stress and strain states of the film. Extensive characterization before and after heat treatment is performed to evaluate the microstructural complexity for various stress and strain values. Mechanical behavior is examined in both the as-sputtered and heat treated state to understand the deformation mechanisms correlated to the microstructure. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Nanotechnology, Thin Films and Interfaces |