Coarsening of Al3Sc precipitates in Al-Mg-Sc alloys
| Autor: | Jingyu Jiang, Zhongqin Tang, Pian Xu, Ning Yan, Feng Jiang, Yongyi Peng, Xuda Xu |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Precipitation (chemistry) Annealing (metallurgy) Mechanical Engineering Alloy Metals and Alloys Analytical chemistry chemistry.chemical_element 02 engineering and technology Activation energy engineering.material Atmospheric temperature range 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry Mechanics of Materials Aluminium Transmission electron microscopy Materials Chemistry engineering 0210 nano-technology Order of magnitude |
| Zdroj: | Journal of Alloys and Compounds. 781:209-215 |
| ISSN: | 0925-8388 |
| Popis: | The coarsening characteristics of Al3Sc precipitates in Al-5Mg-0.3Sc (in wt.%) alloys annealed at 300–450 °C were studied using transmission electron microscope (TEM), with the annealing temperature of the alloy found to have a significant influence on its coarsening rate. Increasing the temperature range from 300 to 450 °C resulted in the coarsening rate increasing by an order of magnitude for every 50 °C. Experimental precipitation results were well correlated with theoretical results produced using a KV model. The diffusion activation energy of the Al3Sc precipitates was shown to be around 189 ± 8 kJ mol−1, with the precipitates exhibiting good coherency with the aluminum matrix, even after being annealed at 300–450 °C for 168 h. |
| Databáze: | OpenAIRE |
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