1. Department of Mechanical Engineering and the Texas Materials Institute, The University of Texas at Austin, One University Station C2200, Austin, Texas, 78712-0292
2. Department of Materials Science and Engineering, KAIST, 373-1, Guseong-dong, Yuseong-gu, Daejeon, 305-701 Korea
3. APL Engineered Materials, Inc., 2401 North Willow Road, Urbana, Illinois, 61802