1. Department of Mechanical and Aerospace Engineering, University of Missouri, Columbia, Missouri 65211, USA
2. Department of Mechanical Engineering and Laboratory for Manufacturing and Productivity, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
3. Materials and Manufacturing Directorate, AFRL/RX, Air Force Research Lab, Ohio 45433, USA
4. Universal Technology Corporation, Beavercreek, Ohio 45424, USA