Thursday, 7 April, 2011, 12:51
Posted by Jagoda Poplewska
1. Attending in seminars:Posted by Jagoda Poplewska
- M. Sc. Eng. Piotr Bobrowski: ‘Investigations on the catalytic Au/TiO2 modelsystem’
- M. Sc. Eng Rafal Abram: ‘Atomistic simulations of the process of phase separation in the Fe-Cr system’;
- M. Sc. Eng Artur Kudyba: ‘Influence of technological factors on the wettability of soldering’;
- Professor Pawel Zieba: ‘Mass and charge transport in polycrystalline materials’;
- Associate Professor Marek Faryna: ‘Correlation between ceramics microstructure and functional properties’;
- Professor Henryk Paul: ‘Instability of plastic flow and their role in texture transformations in fcc metals’;
- Associate Professor Lidia Litynska-Dobrzynska: ‘Development of aluminium alloys’.
2. Discovering of Mendeley possibilities
3. Introduction to the scanning electron microscope to analyze the chemical composition using patterns. The analysis of chemical composition of aluminum-scandium alloy purchased in China. Result of the analysis is consistent with the certificate of purity (Al-2% Sc). This alloy will be subjected to chemical modifications in order to obtain materials of the program of research (Al-Sc and Al-Mg-Sc).
4. Surface preparation and execution of samples analysis in scanning electron microscope aluminum alloy with addition of magnesium and zirconium to confirm the well-selected temperature of homogenization. Earlier observations of the microstructure on the optical microscope revealed the existence of precipitates or voids. Analysis of chemical composition on the scanning electron microscope indicated that these are dispersoids Al3Zr. They are due to the fact that the solubility of zirconium in aluminum is very small, hence they form a separation, which are fairly distributed in the material. The next step is choosing the appropriate temperature heat treatment - this time, supersaturation and aging - based on literature data and own observations. Samples of the Al-Mg-Zr after homogenization were cut into smaller samples, which will undergo further treatment - each at different temperatures. Based on observation of the microstructures will be selected the most appropriate process parameters.
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