1. Material Measurement Laboratory National Institute of Standards and Technology Gaithersburg MD USA
2. Departments of Mechanical Engineering and Aerospace Engineering Sciences University of Colorado Boulder CO USA
3. Materials Science and Engineering Program University of Colorado Boulder CO USA
4. Earth, Environmental and Planetary Sciences Brown University Providence RI USA
5. School of Engineering Newcastle University Newcastle Upon Tyne United Kingdom
6. Department of Mechanical Engineering Sciences University of Surrey Guildford United Kingdom