Abstract
Spherical nanoindentation was performed at room temperature to characterize the time-dependent plasticity behavior of the single-phase CoCrFeMnNi high-entropy alloy (HEA). It was observed that incipient plasticity occurred after a period of waiting time in the apparent elastic regime. Through the experimental data, an activation energy ∼ 0.74 eV and an activation volume ∼ 1.54b3 (b = Burgers vector) were extracted for the delayed plasticity. Our results indicate that heterogeneous dislocation nucleation governs the delayed plasticity in the single-phase CoCrFeMnNi, and also provide quantitative insights into viscoplastic behavior and creep mechanisms in HEAs.
| Original language | English |
|---|---|
| Pages (from-to) | 300-305 |
| Journal | Materials Research Letters |
| Volume | 5 |
| Issue number | 5 |
| Online published | 15 Dec 2016 |
| DOIs | |
| Publication status | Published - 3 Sept 2017 |
Research Keywords
- delayed plasticity
- dislocation nucleation
- High-entropy alloys
- nanoindentation
Publisher's Copyright Statement
- This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/
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