Ultrahigh-Strength Magnesium Alloys for the Future Force: A Final Report on the 5-Year Mission Program, 2009–2013

Report No. ARL-TR-6788
Authors: Vincent Hammond; Suveen Mathaudhu; Kevin Doherty; Shawn Walsh; Lionel Vargas; Brian Placzankis; Joseph Labukas; Marc Pepi; Matt Trexler; Blake Barnett; Tyrone Jones; Laszlo Kecskes
Date/Pages: January 2014; 68 pages
Abstract: Although highly desired because of their low density, magnesium (Mg) alloys have long been passed over for military applications in favor of aluminum alloys due to their low strength and poor corrosion resistance. However, continued advances in Mg alloy development have resulted in a renewed interest within the U.S. Army regarding their use in both structural and protection applications. As a result, in 2009, the U.S. Army Research Laboratory initiated a 5-year research effort to understand the fundamental scientific mechanisms governing the mechanical properties and corrosion performance behavior of Mg alloys. This report details the results of in-house and collaborative efforts in areas such as enhancing mechanical properties through grain refinement and minimizing texture, improving corrosion performance through coatings and elemental additions, and computational modeling to identify underlying mechanisms that govern ductility and processing pathways. The knowledge and insight gained from this multifaceted approach has advanced the state of the art for Mg alloys, thereby increasing their potential insertion into Army systems.
Distribution: Approved for public release
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Last Update / Reviewed: January 1, 2014