1. Center for Manufacturing and Design with Lightweight Materials Michigan Technological University 1 Characterization of Metallic Glasses Background  Metallic glasses (amorphous metals) have high strength similar to ceramics and ductility similar to metals. They are increasingly used in recreational and military applications  Understanding their mechanical behavior is vital to better utilization of these materials Faculty: Ghatu Subhash Students: Hao Li and Hongwen Zhang Research Objective  To determine static and dynamic behavior using hopkinson pressure bar and nanoindentation  Identify the influence of compositional variations on mechanical behavior  Development of constitutive models for deformation and fracture  Identify the mechanism for shearband formation Place Background Figure Here

2. Center for Manufacturing and Design with Lightweight Materials Michigan Technological University 2 Metallic Glasses Result 1  The primary deformation mechanism is the formation of localized shear bands  Shear bands are confined to the region surrounding the nanoindentations  Hardness and Young’s Modulus have been determined  Temperature effects are minimized during the nanoindentation tests Result 2  A strong compositional dependence of mechanical properties have been observed in Zr-Hf based metallic glasses

3. Center for Manufacturing and Design with Lightweight Materials Michigan Technological University 3 ShortProjectTitle