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Kinetics of dendrite growth and dendritic fragmentation in theundercooled Co81.2Cu18.8 alloy’smelt

Published online by Cambridge University Press:  14 May 2014

P.K. Galenko ,
M. Kolbe ,
D.M. Herlach  and
M. Rettenmayr
P.K. Galenko
Affiliation:
Friedrich-Schiller-Universität Jena, Physikalisch-Astronomische Fakultät, Löbdergraben 32, 07743 Jena, Germany. e-mail: [email protected]
M. Kolbe
Affiliation:
Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR), 51147 Köln, Germany
D.M. Herlach
Affiliation:
Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR), 51147 Köln, Germany Institut für Festkörperphysik, Ruhr-Universität Bochum, 44780 Bochum, Germany
M. Rettenmayr
Affiliation:
Friedrich-Schiller-Universität Jena, Physikalisch-Astronomische Fakultät, Löbdergraben 32, 07743 Jena, Germany. e-mail: [email protected]
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Abstract

The growth velocity during solidification of an undercooled melt of a Co-Cu alloyprocessed by electromagnetic levitation was measured using a high speed video camera.Applying a model of local non-equilibrium solidification, theoretical predictions ofdendrite growth velocity and dendritic growth radii are compared with high-accuracymeasurements of the growth kinetics. As the undercooling ΔT reaches a critical valueconsistent with the dendrite growth velocity being equal to the atomic diffusion speedVD in bulk liquid,ΔT =ΔT(VD),the velocity-undercooling relationship exhibits a break-point. A distinct change in thedendritic growth mechanism exists with the onset of complete solute trapping andchemically partitionless solidification of the core of the main stems of the dendritesoccurs. A complete transition to the thermally controlled growth of dendrites occurs atΔT =ΔT(VD)that leads to essential changes in the microstructure of dendritic patterns The phenomenonof dendritic fragmentation in Co-Cu melts, solidifying at ΔT <ΔT(VD),is discussed.

Keywords

undercoolingdendrite growthsolidificationmodeling
Type
Research Article
Information
Metallurgical Research & Technology , Volume 111 , Issue 5 , 2014 , pp. 295 - 303
Copyright
© EDP Sciences 2014

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References

Nakagawa, Y., Acta Metall. 6 (1958) 704 Google Scholar
Nishizawa, T., Ishida, K., Bull. Alloy Phase Diag. 5 (1984) 161 Google Scholar
Munitz, A., Elder-Randall, S.P., Abbaschian, R., Metall. Trans. A 32A (1992) 1817-1827 Google Scholar
Munitz, A., Abbaschian, R., Metall. Mater. Trans. A 27 (1996) 4049 Google Scholar
Cao, C.D., Görler, G.P., Herlach, D.M., Wei, B., Mater. Sci. Eng. A 325 (2002) 503 Google Scholar
M. Kolbe, C.D. Cao, P.K. Galenko, T. Letzig, G.P. Görler, B. Wei, D.M. Herlach, Phase morphology of undercooled Cu-Co alloys in the metastable miscibility gap. In: Science of Metastable and Nanocrystalline Alloys: Structure, Properties and Modelling, edited by A.R. Dinesen et al. National Laboratory, Roskilde, Denmark, Risø¸2001, pp. 289-294 Google Scholar
M. Kolbe, C.D. Cao, P.K. Galenko, J. Fransaer, D.M. Herlach, Dynamics of solidification and microstructure evolution in undercooled Co-Cu alloys with metastable miscibility gap. In: Fundamentals of Advanced Materials for Energy Conservation, edited by D. Chandra and R.G. Bautista. TMS, Warrendale, Pennsylvania, USA, 2002, pp. 539-553 Google Scholar
Alexandrov, D.V., Galenko, P.K., Phys. Rev. E 87 (2013) 062403-1-5 Google Scholar
X.Q., Yang, Z., Chen, W., Yang, J.T., Liu, Int. J. Mater. Res. (formely Z. Metallkd.) 104(8) (2013) 783-788 Google Scholar
Davidoff, E., Galenko, P.K., Herlach, D.M., Kolbe, M., Wanderka, N., Acta Materialia 61 (2013) 1078-1092 Google Scholar
Galenko, P.K., Danilov, D.A., Phys. Lett. A 235 (1997) 271 Google Scholar
Galenko, P.K., Danilov, D.A., J. Cryst. Growth 197 (1999) 992 Google Scholar
D.M. Herlach, P.K. Galenko, D. Holland-Moritz, Metastable solids from undercooled melts, Elsevier, Amsterdam, 2007 CrossRefGoogle Scholar
Wang, K., Wang, H.F., Liu, F., Zhai, H.M., Acta Materialia 61 (2013) 4254-4265 Google Scholar
G.J., Ehlen, D.M., Herlach, IOP Conf. Series: Mater. Sci. Eng. 33 (2012) 012066-1-10 Google Scholar
A.A. Chernov, in Rost Kristallov, edited by A.V. Shubnikov, N.N. Sheftal (Akad. Nauk SSSR, Moscow, 1959), Vol. 3 [Growth of Crystals Consultants Bureau, New York, 1962, Vol. 3, p. 35] Google Scholar
Aziz, M.J., Kaplan, T., Acta Metall. 36 (1988) 2335 Google Scholar
Galenko, P., Phys. Rev. B 65 (2002) 144103-1-11 Google Scholar
Galenko, P., Phys. Rev. E 76 (2007) 031606-1-9 Google Scholar
Bouissou, P., Pelcé, P., Phys. Rev. A 40 (1989) 6673 Google Scholar
Brener, E., Melnikov, V.I., Adv. Phys. 40 (1991) 53 Google Scholar
W. Kurz, D.J. Fisher, Fundamentals of solidification, Trans Tech, Aedermannsdorf, 1998 CrossRefGoogle Scholar
D. Holland-Moritz, P.K. Galenko, O. Shuleshova, W. Löser, Dendrite Growth in Undercooled Ti-Al-Nb melts, (2008) unpublished manuscript Google Scholar
M. Kolbe, Demixing of Cu–Co Alloys Showing a Metastable Miscibility Gap, In: Solidification of Containerless Undercooled Melts, edited by D.M. Herlach, D.M. Matson. Wiley, Weinheim, 2012, pp. 51-67 Google Scholar
Herlach, D.M., Mater. Sci. Eng. Rep. R12 (1994) 177-272 Google Scholar
Schwarz, M., Karma, A., Eckler, K., Herlach, D.M., Phys. Rev. Lett. 73 (1994) 1380 Google Scholar
Karma, A., Int. J. Non-Equilib. Process. 11 (1998) 201 Google Scholar
Rettenmayr, M., Int. Mater. Rev. 54 (2009) 1-17 Google Scholar
Ruvalcaba, D., Mathiesen, R.H., Eskin, D.F., Arnberg, L., Katgerman, L., Acta Mater. 55 (2007) 4287-4292 Google Scholar
Jackson, K.A., Hunt, J.D., Uhlmann, D.R., Seward, T.P., Trans. TMS AIME 236 (1966) 149-158 Google Scholar
Yasuda, H., Ohnaka, I., Kawasaki, K., Sugiyama, A., Ohmichi, T., Iwane, J., Umetani, K., J. Cryst. Growth 262 (2005) 645-652 Google Scholar
Liu, S., Lu, S.Z., Hellawell, A., J. Cryst. Growth 234 (2002) 740-750 Google Scholar
D.M. Herlach, P.K. Galenko, Non-equilibrium solidification in multicomponent transformations: Eutectic transformation, Spinodal decomposition and Glass formation. DLR-Project-Repoprt 50 WM 0736 (Bundesministerium für Wirtschaft und Technologie) 19 May 2011, p. 38 Google Scholar
M., Rettenmayr, Pure. Appl. Chem. 83(5) (2011) 1085-1092 Google Scholar
Galenko, P., Jou, D., Phys. Rev. E 71 (2005) 046125-1-11 Google Scholar
Galenko, P.K., Abramova, E.V., Jou, D., Danilov, D.A., Lebedev, V.G., Herlach, D.M., Phys. Rev. E 84 (2011) 041143-1-15 Google Scholar