|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Ultrafine-grained and Heterostructured Materials (UFGH XII)
||Influence of Strain Gradients in Heterostructured Nanomaterials
||Daniel Goodelman, Andrea M Hodge
|On-Site Speaker (Planned)
Heterostructured nanomaterials have been shown to be a promising solution for the age-old strength-ductility tradeoff issue. Since these materials feature both hard and soft domains that deform at different rates, a plastic gradient is formed that enhances strain hardening. Recently, we have shown that these materials demonstrate complex microstructures after heat treatment, specifically in Inconel 725. Several features such as abnormally large grains sandwiched between nanocrystalline and nanotwinned regions, as well as delta phase, rafted structures, and precipitates were observed. It is expected that the strain gradient in the film drives the mechanisms that lead to such complexity. However, the details of the strain gradient have yet to be fully understood. In this work, nanotwinned Inconel 725 films were synthesized using magnetron sputtering techniques to understand the effect of strain gradients within the film. Extensive characterization before and after heat treatment is evaluated for microstructural complexity for various strain values.
||Characterization, Nanotechnology, Surface Modification and Coatings