Thermal stability and precipitate microstructures of Al−Si−Mg−Er alloy
| Autor: | Hai-hui Xi, Wen-Quan Ming, Cui-lan Wu, Ruohan Shen, Jianghua Chen, Y.X. Lai, Yi He, Qinqin Shao |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Precipitation kinetics Materials science Precipitation (chemistry) Alloy Metals and Alloys 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Geotechnical Engineering and Engineering Geology Condensed Matter Physics Microstructure 01 natural sciences Indentation hardness Artificial aging Average size 0103 physical sciences Materials Chemistry engineering Thermal stability Composite material 0210 nano-technology |
| Zdroj: | Transactions of Nonferrous Metals Society of China. 31:1-10 |
| ISSN: | 1003-6326 |
| DOI: | 10.1016/s1003-6326(20)65474-7 |
| Popis: | The effect of Er on the microhardness and precipitation behavior of the heat-treated Al−Si−Mg alloy was investigated by microhardness tester and TEM. As a comparison, the influence of natural aging was also studied. It is shown that the thermal stability of the over-aged Al−Si−Mg−Er alloy is highly related to the average size of the precipitates. The average size of β’’ precipitates in Al−Si−Mg−Er alloy is smaller than that in Al−Si−Mg alloy, and the distribution is more localized under condition of without introducing natural aging. However, when natural aging is introduced before artificial aging, the Al−Si−Mg−Er alloy has similar average size and distribution of precipitates with the Al−Si−Mg alloy, resulting in similar mechanical properties. The effect of Er on the precipitation kinetics in the alloy was also discussed in detail to explain these phenomena. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect