|About this Abstract
||Materials Science & Technology 2012
||Multifunctional Materials for Aerospace and Defense: Challenges and Prospects
||Mechanical Properties Improvement with Grain Size Reduction in Optimal Electrodeposited Metal/Polymer Microtrusses
||Ante T. Lausic, Craig A. Steeves, Glenn D. Hibbard
|On-Site Speaker (Planned)
||Ante T. Lausic
Metal/polymer composite structures can be fabricated by combining net-shape stereolithography methods with electrodeposition to create hybrid microtruss materials. These stretch-dominated lattice structures can be used in sandwich panels where the mostly porous network of metal tubes provides a low density and high-strength core. By modifying the electrodeposition parameters, the grain size of the metal coating can be decreased, increasing its strength. Changing the material strength through grain size reduction increases the strength of the structure six-fold while maintaining the same mass, but significant additional gains can be made by changing the structural geometry in tandem with the material properties. This study demonstrates the available improvement when an optimally designed polycrystalline Ni/polymer microtruss has its grain size decreased to the nanoscale. By further modifying the architecture, a 15x increase in specific strength is possible for the same loading scenario.