Abstract
The use of triboindentation testing enables a dynamic range of testing that can span more than eight orders of magnitude in strain rate. The mechanical response of a gold-nickel nanocrystalline nanolaminate is investigated as it is subjected to high strain-rate conditions using the nanoscratch test method. The scratch hardness measurements are compared for scratch widths above which the contributions from grain size and layer pair spacing reaches a plateau and representative interface spacing. It is found that the strain-rate sensitivity increases rapidly beyond a 10 + 3 s - 1 strain rate indicative of superplastic behavior.
| Original language | English |
|---|---|
| Pages (from-to) | 103-106 |
| Number of pages | 4 |
| Journal | Materials Letters |
| Volume | 77 |
| DOIs | |
| State | Published - Jun 15 2012 |
Keywords
- Indentation and hardness
- Multilayers
- Nanocrystalline materials
- Thin films