1. Department of Mechanical Engineering, Texas Tech University, Lubbock, Texas 79409, USA
2. Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
3. Departments of Aerospace Engineering, Mechanical Engineering, and Materials Science and Engineering, Iowa State University, Ames, Iowa 50011, USA
4. Ames Laboratory, Division of Materials Science and Engineering, Ames, Iowa 50011, USA