Hot Nanoindentation of Nanocrystalline Ni-W Alloys
High-temperature nanoindentation experiments are conducted to assess the activation enthalpy for deformation of nanocrystalline Ni–W alloys, for grain sizes between 3 and 80 nm. Thermal softening becomes less pronounced at finer grain sizes, and the activation enthalpy has an apparent inflection at...
| Main Authors: | , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
Elsevier
2012
|
| Online Access: | http://hdl.handle.net/1721.1/69220 https://orcid.org/0000-0001-9856-2682 |
| Summary: | High-temperature nanoindentation experiments are conducted to assess the activation enthalpy for deformation of nanocrystalline Ni–W alloys, for grain sizes between 3 and 80 nm. Thermal softening becomes less pronounced at finer grain sizes, and the activation enthalpy has an apparent inflection at a grain size near ∼10–20 nm, in the vicinity of the Hall–Petch breakdown. This inflection is related to that observed in the activation volume for deformation, and is associated with a shift to grain boundary-mediated deformation at the finest grain sizes. |
|---|