| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Ultrafine-grained and Heterostructured Materials (UFGH XI)
|
| Presentation Title |
N-44: Synthesis and Mechanical Characterization of Metallic Films with Highly Controlled Heterogeneous Microstructures |
| Author(s) |
Rohit Berlia, Jagannathan Rajagopalan |
| On-Site Speaker (Planned) |
Rohit Berlia |
| Abstract Scope |
Materials with heterogeneous 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 these heterogeneous microstructures. Here we report a novel technique to synthesize metallic films with highly tailored multimodal microstructures using magnetron sputtering. This technique enabled us to precisely control the grain size dispersion, volume fraction and spatial arrangement of the grains. We synthesized bimodal films of Nickel, Copper, Aluminum and Iron where the mean size of smaller grains is around 40-250 nm while larger grains have mean sizes exceeding 5 µm. The microstructure was characterized by a combination of XRD, EBSD and TEM to reveal grain size dispersion, texture and orientation distribution. The deformation behavior was investigated using MEMS tensile testing device. The results demonstrate the potential of this technique to precisely tailor the mechanical behavior of metallic films. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume |