Prof. Alison Flatau form University of Maryland visited CSMS and give a talk.
The Title
Structural Maganetostrictive Alloys: An Introduction to a New Class of Transducer Materials.
Abstract
Magnetostrictive materials belong to the family of smart materials that are enabling major advances in noise, vibration and shape control, energy harvesting and new approaches to structural health monitoring. An introduction to magnetostrictive materials will be presented, followed by an introduction to the relatively new family of “structural magnetostrictive alloys” such as the Gallium-Iron alloy Galfenol. Examples of potential applications that would take advantage of the combination of magnetostrictive transductionandstructural attributes of these alloys (e.g. ductility and a negative Poisons ratio) will be included in the presentation. Recent advances in development and characterization of Galfenol nanowires will be highlighted. The presentation will also include a brief overview of some of the on-going projects that are part of a Multidisciplinary University Research Initiative (MURI) Program, supported by the US Office of Naval Research (ONR) which in addition to researchers at the Univ. Maryland, includes researchers from Iowa State Univ., Univ. Minnesota, Ohio State, Pennsylvania State, Rutgers University and Virginia Tech. This MURI program is focused on structural magnetostrictive alloys, with an emphasis understanding where the large magnetostriction in structural alloys such as Galfenol comes from, how to fabricate these alloys at different scales, and how to employ these alloys in a variety of applications.
