Bottom-up and top-down nanostructuring of soft face-centered cubic alloys by severe plastic deformation and consolidation
Research focused on production of high strength nanostructured dilute silver alloys for high strain rate/structural/electronics applications. Elemental silver has high formability, good corrosion resistance, disinfectant properties, and possesses the highest thermal and electrical conductivity of any metal, however, these useful properties are overshadowed by its poor mechanical strength. Bottom-up processing and consolidation through a combination of mechanical alloying (MA) and spark plasma sintering (SPS) or top-down processing by high-pressure torsion (HPT) are used to produce high strength nanocrystalline and ultrafine-grained silver alloys. These alloys possess increased strength compared to their coarse-grained counterparts, achieved through a combination of solid solution strengthening, nanoscale dispersion strengthening, and grain boundary strengthening and forecast the ability to process high-strength, high-conductivity silver alloys for electronic and structural applications.
Researchers: Erik Sease, Evander Ramos