|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Ultrafine-grained Materials X
||Development of Al and Mg-based Nanostructured Alloys
||Aashish Rohatgi, Nicole Overman, Scott Whalen, Suveen Mathaudhu
|On-Site Speaker (Planned)
This presentation will describe PNNL’s current research in ultrafine-grained (UFG) materials, focusing on light-weight Al and Mg based nanostructured alloys for structural applications. A key challenge in developing bulk UFG materials is how to design and fabricate a bulk nanostructured material that does not lose its nanostructure during the fabrication process. This challenge is being addressed in our work by using thermodynamic modeling to identify thermally stable nanostructured binary alloys, followed by thin-film based approach to validate the model predictions. Subsequently, UFG precursor flakes are produced using rapid solidification of the molten alloy, followed by a single-step, shear-extrusion based solid-state densification that produces the bulk nanostructured material. Microstructural analysis during the various stages of material flow will be presented. Finally, barriers to replacing conventional materials with UFG materials, such as cost, final properties and component size, will be discussed with respect to mass-market automotive applications.
||Planned: Supplemental Proceedings volume