Preparation of Twinned Dendrites of Al-Zn Alloy with High Zn Content

• Autorzy: Gao K. , Song W. , Fan L. , Ding Y. , Guo X. , Zhang R.

Identyfikatory

DOI

10.24425/amm.2018.125090

• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

directional solidification; twinned dendrite; microstructure; growth orientation; deviation angle

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2018
• Tom: Vol. 63, iss. 4
• Strony: 1657--1662
• Opis fizyczny: Bibliogr. 19 poz., fot., rys., wzory

Twórcy

autor

Gao K.

• Zhengzhou University of Aeronautics, Zhengzhou 450015, P.R. China
• Henan Key Laboratory of Aeronautical Material and Application Technology, Zhengzhou 450015, P.R. China

autor

Song W.

• Zhengzhou University of Aeronautics, Zhengzhou 450015, P.R. China

autor

Fan L.

• Zhengzhou University of Aeronautics, Zhengzhou 450015, P.R. China
• Henan Key Laboratory of Aeronautical Material and Application Technology, Zhengzhou 450015, P.R. China

autor

Ding Y.

• Zhengzhou University of Aeronautics, Zhengzhou 450015, P.R. China
• Henan Key Laboratory of Aeronautical Material and Application Technology, Zhengzhou 450015, P.R. China

autor

Guo X.

• Zhengzhou University of Aeronautics, Zhengzhou 450015, P.R. China
• Henan Key Laboratory of Aeronautical Material and Application Technology, Zhengzhou 450015, P.R. China

autor

Zhang R.

• Zhengzhou University of Aeronautics, Zhengzhou 450015, P.R. China
• Henan Key Laboratory of Aeronautical Material and Application Technology, Zhengzhou 450015, P.R. China
• Zhengzhou University, Zhengzhou 450001, P.R. China

Bibliografia

• [1] X. Li, Y. Fautrelle, A. Gagnoud, G. Cao, Y. Zhang, Z. Ren, High magnetic field induction of the formation of twinned dendrites during directional solidification of Al-4.5wt%Cu alloy, Phil. Mag. Lett. 94, 118-126 (2014).
• [2] H. J. Wood, J. D. Hunt, P. V. Evans, Modelling the growth of feather crystals, Acta. Mater. 45, 569-574 (1997).
• [3] M. A. Salgado-Ordorica, M. Rappaz, Twinned dendrite growth in binary aluminum alloys, Acta. Mater. 56, 5708-5718 (2008).
• [4] G. Kurtuldu, P. Jarry, M. Rappaz, Influence of Cr on the nucleation of primary Al and formation of twinned dendrites in Al-Zn-Cr alloys: Can icosahedral solid clusters play a role, Acta. Mater. 61, 7098-7108 (2013).
• [5] M. A. Salgado-Ordorica, P. Burdet, M. Cantoni, M. Rappaz, Study of the twinned dendrite tip shape II: Experimental assessment, Acta. Mater. 59, 5085-5091 (2011).
• [6] M. A. Salgado-Ordorica, J. Valloton, M. Rappza, Study of twinned dendrite growth stability, Scripta. Mater, 61, 367-370 (2009).
• [7] K. I. Dragnevski, R. F. Cochrane, A. M. Mullis, The solidification of undercooled melts via, twinned dendritic growth, Metall. Mater. Trans. A. 35, 3211-3220 (2004).
• [8] M. A. Salgado-Ordorica, A. B. Phillion, M. Rappaz, Morphology and Growth Kinetic Advantage of Quenched Twinned Dendrites in Al-Zn Alloys, Metall. Mater. Trans. A. 44, 2699-2706 (2013).
• [9] F. Gonzales, M. Rappaz, Dendrite growth directions in aluminum-zinc alloys, Metall. Mater. Trans. A. 37, 2797-2806 (2006).
• [10] F. Gonzales, M. Rappaz, Grain Selection and Texture Evolution in Directionally Solidified Al-Zn Alloys, Metall. Mater. Trans. A. 39, 2148-2160 (2008).
• [11] S. Yamada, M. Yoshimura, S. Sakata, T. Taishi, K. Hoshikawa, Colony structure in ce-doped Al2O3/YAG eutectic systems grown by vertical Bridgman technique, J. Cryst. Growth. 448, 1-5 (2016).
• [12] A. Hübner, D. Strobusch, H. W. Lerner, The Twinned Crystal Structure of Zinc (II) Acetylacetonate Trimer, J. Chem. Crystallogr. 38, 953-957 (2008).
• [13] S. Henry, M. Rappaz, P. Jarry, <110> dendrite growth in aluminium feathery grains, Metall. Mater. Trans. A. 29, 2807-2817 (1998).
• [14] S. S. V. Tatiparti, F. Ebrahimi, Preferred orientation and shape of electrodeposited nanocrystalline Al-Mg alloy dendrites, Mater. Letter. 65, 1915-1918 (2011).
• [15] K. Gao, S. M. Li, S. J. Song, H. Z. Fu, Influences of microstructure and orientation on fracture toughness of intermetallic phase Al2Cu-based alloy under directional solidification, Fatigue. Fract. Eng. M. 39, 511-520 (2016).
• [16] E. Acer, E. Çadırlı, H. Erol, M. Gündüz, Effect of Growth Rate on the Microstructure and Microhardness in a Directionally Solidified Al-Zn-Mg Alloy, Metall. Mater. Trans. A. 47, 3040-3051 (2016).
• [17] A. M. Mullis, Understanding the formation of twinned dendrites ('feather'grains). (Department of Engineering Materials University of Sheffield, 2007)
• [18] A. N. Turchin, M. Zuijderwijk, J. Pool, D.G. Eskin, L. Katgerman, Feathery grain growth during solidification under forced flow conditions, Acta. Mater. 55, 3795-3801 (2007).
• [19] P. C. Sharath, K. R. Udupa, G. V. P. Kumar, Effect of Multi Directional Forging on the Microstructure and Mechanical Properties of Zn-24 wt% Al-2 wt% Cu Alloy, T. Indian. I. Metals. 70, 1-8 (2017).

Uwagi

EN

1. This work was financially supported by the fund of the Henan Provincial Key Scientific Research Project (No.162102210241) and Henan Provincial Higher Education (No.17A430007).

PL

2. Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).