Nanocrystalline Al-Mg with extreme strength due to grain boundary doping
| Autor: | Simon C. Pun, Timothy J. Rupert, Amirhossein Khalajhedayati, Jennifer D. Schuler, Jason R. Trelewicz, Wenbo Wang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Annealing (metallurgy) Alloy FOS: Physical sciences 02 engineering and technology engineering.material 01 natural sciences Specific strength Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences General Materials Science Homologous temperature Grain boundary strengthening 010302 applied physics Condensed Matter - Materials Science Condensed Matter - Mesoscale and Nanoscale Physics Mechanical Engineering Metallurgy Materials Science (cond-mat.mtrl-sci) 021001 nanoscience & nanotechnology Condensed Matter Physics Nanocrystalline material Grain growth Mechanics of Materials engineering Grain boundary 0210 nano-technology |
| Zdroj: | Materials Science and Engineering: A. 696:400-406 |
| ISSN: | 0921-5093 |
| Popis: | Nanocrystalline Al-Mg alloys are used to isolate the effect of grain boundary doping on the strength of nanostructured metals. Mg is added during mechanical milling, followed by low homologous temperature annealing treatments to induce segregation without grain growth. Nanocrystalline Al -7 at.% Mg that is annealed for 1 h at 200 {\deg}C is the strongest alloy fabricated, with a hardness of 4.56 GPa or approximately three times that of pure nanocrystalline Al. Micropillar compression experiments indicate a yield strength of 865 MPa and a specific strength of 329 kN m/kg, making this one of the strongest lightweight metals reported to date. Comment: 8 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect