@ARTICLE{Gao_K._Preparation_2018, author={Gao, K. and Song, W. and Fan, L. and Ding, Y. and Guo, X. and Zhang, R.}, volume={vol. 63}, number={No 4}, journal={Archives of Metallurgy and Materials}, pages={1657-1662}, howpublished={online}, year={2018}, publisher={Institute of Metallurgy and Materials Science of Polish Academy of Sciences}, publisher={Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences}, abstract={Twinned dendrites in Al-Zn alloy with high Zn content (40% wt.%) were successfully prepared by directional solidification. At different directional solidification rates (1000 and 1500 μm/s), microstructures and growth orientation variations of Al twinned dendrite and non-twinned dendrite were characterized. By using the inverted trapezoidal graphite sleeve at 1000 μm/s, Al twinned dendrite were formed to developed feather crystal structures in longitudinal section. Its primary and secondary twinned dendrite were grew along [110] direction. Moreover the deviation angle between [110] direction of Al twinned dendrite and the heat flow direction was about 27.15°. While not using the inverted trapezoidal graphite sleeve at 1000 and 1500 μm/s, Al dendrite was the non-twinned dendrite and the twinned dendrite was not appeared. The experimental results showed that the higher temperature gradient, a certain pulling rate and convection environment were the formation conditions of twinned dendrites.}, type={Artykuły / Articles}, title={Preparation of Twinned Dendrites of Al-Zn Alloy with High Zn Content}, URL={http://journals.pan.pl/Content/109131/PDF/AMM-2018-4-12-Gao.pdf}, doi={10.24425/amm.2018.125090}, keywords={directional solidification, twinned dendrite, microstructure, growth orientation, the deviation angle}, }