Al-8Mg alloy with high strength and high ductility by addition of a grain boundary strengthening element
| Autor: | Yorinobu Takigawa, Rina Ohte, Masaki Ninomiya, Tokuteru Uesugi, Kenji Higashi |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Mechanical Engineering Alloy Transgranular fracture 02 engineering and technology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Intergranular fracture Mechanics of Materials Ultimate tensile strength engineering General Materials Science Grain boundary Composite material 0210 nano-technology Ductility Grain boundary strengthening Tensile testing |
| Zdroj: | Materials Letters. 245:218-221 |
| ISSN: | 0167-577X |
| DOI: | 10.1016/j.matlet.2019.03.015 |
| Popis: | An Al-8Mg-based alloy with high strength and high ductility was developed by adding a grain boundary strengthening element. Zr was predicted to be the most effective element for grain boundary strengthening at 298 K from first-principles calculations. Then, an Al-8Mg-0.2Zr alloy was developed. Grain boundary analysis by high-angle annular dark-field scanning transmission electron microscopy and Auger electron spectroscopy revealed that the added Zr segregated at grain boundaries in the Al-8Mg-0.2Zr alloy. The Al-8Mg-0.2Zr alloy exhibited tensile elongation of 49% with transgranular fracture, whereas the Al-8Mg alloy exhibited tensile elongation of 28% with intergranular fracture after tensile tests at room temperature. We succeeded in developing a high strength and high ductility Al-8Mg-0.2Zr alloy which compensates for the trade-off between strength and ductility in comparison with commercial Al alloys. |
| Databáze: | OpenAIRE |
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