• SEM micrograph with indentation grid

• Indents spaced 10 μm horizontally and 20 μm vertically

• Wide variety within indent space• Transitions in mechanical

properties consistent with interphase regions

• Future work• Evaluate mechanisms of

degradation• Improve correlation

between phase and properties

• Elucidate interaction between indenter and surface

Images from: R.D. Moser, P.G. Allison, and M.Q. Chandler. Characterization of Impact Damage in Ultra-High Performance Concrete Using Spatially Correlated Nanoindentation/SEM/EDX. Journal of Materials Engineering and Performance. August 2013

Concrete and Steel Reinforcement• Characterizing the interface

between concrete and steel reinforcement

• Interphases between materials not well defined

Image from: P.G. Allison, R.D. Moser, C.A. Weiss Jr., P.G. Malone, S.W. Morefield. Nanomechanical and chemical characterization of the interface between concrete, glass–ceramic bonding enamel and reinforcing steel. Construction and Building Materials 37 (2012) 638–644.

UAB