|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Mechanical Behavior at the Nanoscale IV
||Synthesis and Mechanical Characterization of Metallic Films with Precisely Tailored Multimodal Microstructures
||Rohit Berlia, Ehsan Izadi, Jagannathan Rajagopalan
|On-Site Speaker (Planned)
Materials with multimodal microstructures have been shown to exhibit a superior combination of strength and toughness compared to homogeneous nanostructured or coarse-grained materials. However, only limited progress has been made in controlling the microstructure of such materials. Here we report a novel technique to synthesize metallic films with highly tailored multimodal microstructures using sputtering. Using this technique, we synthesized bimodal Nickel and Aluminum films where the mean size of smaller grains is around 50-250 nm while larger grains have mean sizes exceeding 5 Ám. More importantly, the technique allowed us to accurately control the volume fraction, spatial distribution and connectivity of the two sets of grains. Aluminum and Nickel films with varying degrees of microstructural heterogeneity were synthesized using this technique and their deformation behavior was investigated using MEMS based tensile testing. The results demonstrate the potential of this technique to precisely tailor the mechanical behavior of metallic films.
||Planned: Supplemental Proceedings volume