|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Ultrafine-grained and Heterostructured Materials (UFGH XII)
||Mechanical Behavior of Heterostructured Fe Films with Precisely Defined Bimodal Architectures
||Rohit Berlia, Jagannathan Rajagopalan
|On-Site Speaker (Planned)
Heterostructured metals exhibit a superior combination of strength and toughness compared to homogeneous nanostructured and coarse-grained metals. However, our ability to robustly tailor the microstructure of such materials is still limited. Here we report a method to fabricate heterostructured metallic films with precisely defined architectures, wherein the size, volume fraction and spatial distribution of nanocrystalline (NC) and single crystal (SC) domains can be explicitly controlled. Using this technique, we synthesized bimodal Fe films with two architectures - SC and NC domains in series and parallel - and explored their stress-strain behavior. Furthermore, we also varied the loading axis with respect to the crystallographic orientation of the SC domains. Our results show that both the overall architecture and the slip geometry in the SC domains play a crucial role in determining the stress-strain response. These findings open up the possibility of systematically tailoring the mechanical properties of heterostructured metals.
||Mechanical Properties, Thin Films and Interfaces,