Local damage in grain boundary stabilized nanocrystalline aluminum
| Autor: | Pankaj Kumar, Leslie T. Mushongera, Wenye Ye, Mano Misra |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Nanostructure
Materials science Dopant Magnesium Mechanical Engineering Nucleation food and beverages chemistry.chemical_element 02 engineering and technology Intergranular corrosion 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Nanocrystalline material 0104 chemical sciences chemistry Mechanics of Materials Aluminium General Materials Science Grain boundary Composite material 0210 nano-technology |
| Zdroj: | Materials Letters. 300:130153 |
| ISSN: | 0167-577X |
| DOI: | 10.1016/j.matlet.2021.130153 |
| Popis: | The excess free volume in grain boundaries of pure nanocrystalline aluminum leads to the grain coarsening, which degrades their desirable mechanical properties. The preferential segregation of dopants to the grain boundaries has been proposed to enhance the stability of the nanostructure. To shed light on the stabilization mechanisms, we present results from virtual mechanical tests on nanocrystalline aluminum samples with similar grain sizes but different magnesium dopant contents. The segregation of magnesium decreases the excess free volume within the grain boundaries and prohibits the nucleation and growth of intergranular cracks. |
| Databáze: | OpenAIRE |
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