Indentation of Bulk Amorphous Metals to Investigate Pop-In Effects
Abstract
Bulk metallic glasses (BMG) are a fairly new class of materials that exhibit high strength, low density, and corrosive resistance, as compared to traditional metals, and are useful for various applications. Spherical depth-sensing indentation of BMG reveals stepwise displacement jumps in the load-displacement curves, known as pop-ins. These pop-ins have been found to be correlated with plastic deformation; the initial one being associated with the elastic limit of the material. The initial displacement bursts are investigated for varying stoichiometries of Zr and Hf-based BMG. Attention is focused on pressure and energy per volume at initial pop-in location as a function of different strain rates, indenter tip radius, and material composition. This research may provide further insight and understanding for macroscale behavior of BMG.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 2006
- Accession Number
- ADA451391
Entities
People
- Mark Vanlandingham
- Thomas J. Juliano
- Tyler Krus
Organizations
- United States Army Research Laboratory