TY - JOUR N2 - 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. L1 - http://journals.pan.pl/Content/109131/PDF/AMM-2018-4-12-Gao.pdf L2 - http://journals.pan.pl/Content/109131 PY - 2018 IS - No 4 EP - 1662 DO - 10.24425/amm.2018.125090 KW - directional solidification KW - twinned dendrite KW - microstructure KW - growth orientation KW - the deviation angle A1 - Gao, K. A1 - Song, W. A1 - Fan, L. A1 - Ding, Y. A1 - Guo, X. A1 - Zhang, R. PB - Institute of Metallurgy and Materials Science of Polish Academy of Sciences PB - Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences VL - vol. 63 DA - 2018.12.12 T1 - Preparation of Twinned Dendrites of Al-Zn Alloy with High Zn Content SP - 1657 UR - http://journals.pan.pl/dlibra/publication/edition/109131 T2 - Archives of Metallurgy and Materials ER -