Delayed plasticity during nanoindentation of single-phase CoCrFeMnNi high-entropy alloy
| Autor: | Zhaoping Lu, J. F. Zeng, C. Zhu, Y.F. Ye, Yong Yang, T.G. Nieh, Sui-Dong Wang, Quanfeng He |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science High-entropy alloys nanoindentation High entropy alloys delayed plasticity Alloy 02 engineering and technology Plasticity engineering.material Nanoindentation Physics::Classical Physics 021001 nanoscience & nanotechnology 01 natural sciences dislocation nucleation Condensed Matter::Materials Science Crystallography 0103 physical sciences engineering lcsh:TA401-492 General Materials Science lcsh:Materials of engineering and construction. Mechanics of materials Composite material Single phase 0210 nano-technology |
| Zdroj: | Materials Research Letters, Vol 5, Iss 5, Pp 300-305 (2017) |
| ISSN: | 2166-3831 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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