The elastic modulus of a metallic glass is determined to be 95 GPa using nanoindentation testing with

Question:

The elastic modulus of a metallic glass is determined to be 95 GPa using nanoindentation testing with a diamond Berkovich tip. The Poisson's ratio of the metallic glass is 0.36. The unloading stiffness as determined from the load displacement data is 5.4 × 105 N/m. The maximum load is 120 mN. What is the hardness of the metallic glass at this indentation depth?