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Effect of cooling rates on solidification and microstructure of rapidly solidified Mg57Zn37Y6 quasicrystal alloy

Published online by Cambridge University Press:  28 September 2015

Min Xu ,
Xinying Teng  and
Jiwei Geng
Min Xu
Affiliation:
School of Materials Science and Engineering, University of Jinan, Jinan 250022, Shandong Province, People's Republic of China
Xinying Teng*
Affiliation:
School of Materials Science and Engineering, University of Jinan, Jinan 250022, Shandong Province, People's Republic of China
Jiwei Geng
Affiliation:
State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

The influence of cooling rates on the solidification and microstructure of rapidly solidified quasicrystal alloys with a nominal compositions of Mg57Zn37Y6 (at.%) prepared by melt spinning method was investigated. The microstructure, phase constitution, phase transition, and phase structure of the alloys were examined by means of scanning electron microscopy, x-ray diffraction, energy dispersive spectrometer, differential scanning calorimetry, and transmission electron microscopy. The results show that rapid solidification refines and homogenizes the microstructure of Mg57Zn37Y6 alloys, compared to the conventionally-cast master alloy. With the increasing cooling rate of rapid solidification, the thickness of the ribbon decreases greatly and a larger amount of I-phase can be formed. α-Mg, MgZn, and icosahedral phases are found in the as-cast alloy, but the MgZn phase is absent from rapidly solidified alloys. The I-phase in both as-cast and rapidly solidified alloys can precipitate directly from the melt during the solidification process. A higher cooling rate can lead to a large degree of supercooling, resulting in a decreased phase transition temperature and a large number of icosahedral short-range orders (ISROs). ISROs can act as templates in liquid and promote the nucleation of I-phase.

Keywords

Mg57Zn37Y6 alloysquasicrystalscooling raterapid solidificationphase transition
Type
Articles
Information
Journal of Materials Research , Volume 30 , Issue 21 , 13 November 2015 , pp. 3324 - 3330
Copyright
Copyright © Materials Research Society 2015 

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Footnotes

Contributing Editor: Yang-T. Cheng

References

REFERENCES

Hono, K., Mendis, C.L., Sasaki, T.T., and Oh-ishi, K.: Towards the development of heat-treatable high-strength wrought Mg alloys. Scr. Mater. 63, 710 (2010).Google Scholar
Shechtman, D., Blech, I., Gratias, D., and Cahn, J.W.: Metallic phase with long-range orientational order and no translational symmetry. Phys. Rev. Lett. 53, 1951 (1984).Google Scholar
Luo, Z.P., Zhang, S.Q., Tang, Y.L., and Zhao, D.S.: Quasicrystals in as-cast Mg–Zn–RE alloys. Scr. Metall. Mater. 28, 1513 (1993).Google Scholar
Tsai, A.P., Niikura, A., Inoue, A., and Masumoto, T.: Stoichiometric icosahedral phase in the Zn–Mg–Y system. J. Mater. Res. 12, 1468 (1997).Google Scholar
Wollgarten, M., Beyss, M., and Urban, K.: Direct evidence for plastic deformation of quasicrystals by means of a dislocation mechanism. Phys. Rev. Lett. 71, 549 (1993).Google Scholar
Takeuchi, S., Iwanaga, H., and Shibuya, T.: Hardness of quasicrystals. Jpn. J. Appl. Phys. 30, 561 (1991).Google Scholar
Dubois, J.M., Kang, S.S., and von Stebut, J.: Quasicrystalline low-friction coatings. J. Mater. Sci. Lett. 10, 537 (1991).Google Scholar
Yoshida, T., Itoh, K., Tamura, R., and Takeuchi, S.: Plastic deformation and hardness in Mg-Zn-(Y, Ho) icosahedral quasicrystals. Mater. Sci. Eng., A 786, 294 (2000).Google Scholar
Yang, W., Liu, F., Wang, H.F., Lu, B.P., and Yang, G.C.: Non-equilibrium transformation kinetics and primary grain size distribution in the rapid solidification of Fe–B hypereutectic alloy. J. Alloys Compd. 509(6), 2903 (2011).Google Scholar
Lavernia, E.J. and Srivatsan, T.S.: The rapid solidification processing of materials: Science, principles, technology, advances, and applications. J. Mater. Sci. 45(2), 287 (2010).CrossRefGoogle Scholar
Gogebakan, M., Uzun, O., Karaaslan, T., and Keskin, M.: Rapidly solidified Al-6.5 wt.% Ni alloy. J. Mater. Process. Technol. 142(1), 87 (2003).Google Scholar
Guo, X.F. and Shechtman, D.: Extruded high-strength solid materials based on magnesium with zinc, yttrium, and cerium additives. Glass Phys. Chem. 31(1), 44 (2005).Google Scholar
Lee, S.W., Wang, H.Y., Chen, Y.L., Yeh, J.W., and Yang, C.F.: An Mg–Al–Zn alloy with very high specific strength and superior high-strain-rate superplasticity processed by reciprocating extrusion. Adv. Eng. Mater. 6(12), 948 (2004).Google Scholar
Wan, D.Q., Yang, G.C., Lin, L., and Feng, Z.G.: Equilibrium and non-equilibrium microstructures of Mg–Zn–Y quasicrystal alloy. Mater. Lett. 62, 1711 (2008).Google Scholar
Yi, S., Park, E.S., Ok, J.B., Kim, W.T., and Kim, D.H.: (Icosahedral phase + α-Mg) two phase microstructures in the Mg–Zn–Y ternary system. Mater. Sci. Eng., A 300, 312 (2001).Google Scholar
Zhang, Z.M., Xu, C.J., and Guo, X.F.: Microstructure of Mg-6.4Zn-1.1Y alloy fabrication by rapid solidification and reciprocating extrusion. Acta Metall. Sin. (Engl. Lett.) 21, 30 (2008).Google Scholar
Liu, Z.G., Chai, L.H., and Chen, Y.Y.: Effect of cooling rate and Y element on the microstructure of rapidly solidified TiAl alloys. J. Alloys Compd. 504, 491 (2010).Google Scholar
Geng, J.W., Teng, X.Y., Zhou, G.R., and Zhao, Z.W.: Solidification and microstructure of as-cast Mg65Zn32Y3 quasicrystal alloy. Phys. B 420, 64 (2013).Google Scholar
Li, C.R., Lu, N.P., Xu, Q., Mei, J., Dong, W.J., Fu, J.L., and Cao, Z.X.: Decahedral and icosahedral twin crystals of silver: Formation and morphology evolution. J. Cryst. Growth 319, 88 (2011).Google Scholar
Taha, M.A.: Geometry of melt-spun ribbons. Mater. Sci. Eng., A 134, 1162 (1991).Google Scholar
Cantor, B., Kim, W.T., Bewlay, B.P., and Gillen, A.G.: Microstructure-cooling rate correlations in melt-spun alloys. J. Mater. Sci. 26(5), 1266 (1991).Google Scholar
Gillen, A.G. and Cantor, B.: Photocalorimetric cooling rate measurements on a Ni-5wt.% Al alloy rapidly solidified by melt spinning. Acta Metall. 33(10), 1813 (1985).Google Scholar
Liu, G., Zhang, Z.Z., Chen, Q., Zhang, H., Yin, C.H., and Zhang, S.M.: Microstructures and properties of rapidly solidified Mg–Zn–Y–Zr alloy ribbons. Mater. Eng. 9, 38 (2009). [In Chinese].Google Scholar
Geng, J.W., Teng, X.Y., Zhou, G.R., Zhao, D.G., and Leng, J.F.: Growth mechanism of an icosahedral quasicrystal and solute partitioning in a Mg-rich Mg–Zn–Y alloy. J. Mater. Res. 29, 942 (2014).Google Scholar
Shi, F., Guo, X.F., and Zhang, Z.M.: Study on the quasicrytal phase in Mg74Zn25Y1 alloy. Chin. J. Mech. Eng. 39(8), 138 (2003).Google Scholar
Li, M.R. and Kuo, K.H.: Intermetallic phases and phase reactions in Zn–Mg (<40 at.%)-Y (<20 at.%) region. J. Alloys Compd. 432, 81 (2007).Google Scholar
Ok, J.B., Kim, I.J., Yi, S., Kim, T.W., and Kim, D.H.: Solidification microstructure of as-cast Mg–Zn–Y alloys. Philos. Mag. A 83, 2359 (2003).Google Scholar
Ranganathan, S. and Inoue, A.: An application of Pettifor structure maps for the identification of pseudo-binary quasicrystalline intermetallics. Acta Mater. 54, 3647 (2006).Google Scholar
Chattopadhyay, K., Ravishankar, N., and Goswami, R.: Shapes of quasicrystals. Prog. Cryst. Growth Charact. Mater. 34, 237 (1997).Google Scholar
Liu, Y.C., Yang, G.C., Zhou, Y.H., Wang, T., Xu, D.S., and Xu, Q.Y.: Growth mode of decagonal quasicrystal phase in laser resolidified Al72Ni12Co16 alloy. J. Cryst. Growth 207, 292 (1999).Google Scholar
Klein, H., Audier, M., Simonet, V., Hippert, F., and Bellissent, R.: Icosahedral order in a liquid metallic alloy: Molten AlPdMn quasicrystal. Phys. B 964, 241 (1998).Google Scholar
Holland-Moritz, D., Schroers, J., Herlach, D.M., Grushko, B., and Urban, K.: Undercooling and solidification behaviour of melts of the quasicrystal-forming alloys Al–Cu–Fe and Al–Cu–Co. Acta Mater. 46(5), 1601 (1998).Google Scholar
Roik, O.S., Galushko, S.M., Samsonnikov, O.V., Kazimirov, V.P., and Sokolskii, V.E.: Structure of liquid Al–Cu–Co alloys near the quasicrystal-forming range. J. Non-Cryst. Solids 357, 1147 (2011).Google Scholar
Geng, J.W., Teng, X.Y., Zhou, G.R., and Zhao, D.G.: Temperature dependence of the electrical resistivity of Mg–Zn–Y quasicrystal alloy. Mater. Lett. 132, 334 (2014).Google Scholar
Ye, S.L., Li, X.Y., Bian, X.F., Wang, W.M., and Yin, L.J.: Remelting treatment and heredity phenomenon in the formation of Fe78Si9B13 amorphous alloy. J. Alloys Compd. 562, 143 (2013).Google Scholar
Dmitrienko, V.E., Astaf’ev, S.B., and Kléman, M.: Growth, melting, and clustering of icosahedral quasicrystals: Monte Carlo simulations. Mater. Sci. Eng., A 294–296, 413 (2000).Google Scholar
Egami, T.: Icosahedral order in liquids. J. Non-Cryst. Solids 353, 3666 (2007).Google Scholar