1. Manufacturing Science Division Oak Ridge National Laboratory Oak Ridge TN, 37831 USA
2. National Renewable Energy Laboratory (NREL) Golden CO 80401 USA
3. Metallurgical and Materials Engineering Colorado School of Mines Golden CO 80401 USA
4. Karlsruhe Institute of Technology 76131 Karlsruhe Germany
5. Mechanical Engineering Colorado School of Mines Golden CO 80401 USA