Dispersoid particles precipitated during the solutionizing course of Al-12 wt%Si-4 wt%Cu-1.2 wt%Mn alloy and their influence on high temperature strength
| Autor: | Pavel Petrov, Uday S. Dixit, Hengcheng Liao, Xiaojing Suo, Guangjin Li, Yiyun Hu, Yunyi Tang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Mechanical property Materials science Number density Precipitation (chemistry) Mechanical Engineering Metallurgy Mn alloy 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences Mechanics of Materials 0103 physical sciences General Materials Science Orthorhombic crystal system Selected area diffraction 0210 nano-technology |
| Zdroj: | Materials Science and Engineering: A. 699:201-209 |
| ISSN: | 0921-5093 |
| DOI: | 10.1016/j.msea.2017.04.091 |
| Popis: | Microstructure evolution during the solutionizing course of Al-12 wt%Si-4 wt%Cu-1.2 wt%Mn alloy was characterized by XRD and TEM-SAD (selected area diffraction), and the contribution of dispersoid Mn-rich precipitates to high temperature strength is discussed qualitatively. Fine and dispersoid Al 20 Cu 2 Mn 3 (orthorhombic structure, a=2.34 nm, b=1.32 nm, c=0.75 nm) and Al 15 Mn 3 Si 2 (body center cubic structure, a=2.259 nm) particles are found to precipitate during the solutionizing course. Both the solutionizing temperature and time have an important influence on the precipitation behavior of these particles. The number density of the precipitates first increased and then decreased with the solutionizing temperature. It decreased monotonically with the solutionizing time. The variation trend of the size of precipitates with temperature and time was opposite to that of the number density. The precipitation of these dispersoid Al 20 Cu 2 Mn 3 and Al 15 Mn 3 Si 2 particles has a considerable influence on the high temperature strength. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect