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Thrust 1: Nanocomposites

Research under the Nanocomposites thrust will create thermally stable structural and magnetic nanocomposites using predictive computational and experimental alloy design tools; novel, far-from-equilibrium synthesis approaches; and emerging consolidation and bulk fabrication approaches for generation of desired quantities of nanocomposites. Three projects, all beginning in FY 2016, are focusing their efforts to meet this goal.

Projects

Bulk Nanostructured Alloy Optimization: Designing for Processing and Thermal Stability

A Rohatgi, RS Vemuri, G Nandipati, A Devaraj, S Mathaudhu

We are developing nanostructured alloys that can be fabricated in bulk form (>1 cm3) without compromising their nanostructure, either during the fabrication process or during service at elevated temperatures. This project has three objectives:

  • Design alloy compositions with the potential to form thermally stable nanostructures.
  • Develop techniques for rapid validation of alloy compositions predicted to form thermally stable nanostructures.
  • Develop techniques for rapid optimization of alloy compositions that have been validated to form thermally stable nanostructures.

Scalable Processing of Nanostructured Materials

NR Overman, J.T. Darsell, VV Joshi, DK Schreiber, MJ Olszta, K Kruska, H Jiang, BJ Riley, S Mathaudhu

Our focus is on the development of robust synthesis strategies for bulk production of nanostructured materials. Applications of this work will focus on improved soft magnetic materials and lightweight, high-temperature structural alloys. The goals of this project focus on clarifying the interplay between nonequilibrium processing conditions, microstructure, and thermal stability. Evaluation of grain/phase morphologies coupled with thermal and/or mechanical properties will improve our ability to perform tailored microstructural processing in the material systems studied.

Bulk Thermally Stable Nanocomposite Processing

SA Whalen, S Mathaudhu, JT Darsell, S Jana, GJ Grant, KA Ross, Y Li, S Hu

We are working to understand how the processing conditions—temperature, time, strain and current—affect the formation of the nanocomposite soft magnets and lightweight structural metals. The goals include developing novel current-assisted and high-shear-consolidation processing methods to enable robust and economical bulk manufacturing of nanostructured materials.

Helen Jiang (left) and Saumyadeep Jana prepare an experiment to consolidate powder into nanostructured bulk material.
Helen Jiang (left) and Saumyadeep Jana prepare an experiment to consolidate powder into nanostructured bulk material.

MS3 Initiative

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