Hostname: page-component-8448b6f56d-cfpbc Total loading time: 0 Render date: 2024-04-18T08:06:45.655Z Has data issue: false hasContentIssue false
  • English
  • Français

Faceted–nonfaceted growth transition and 3-D morphological evolution of primary Al6Mn microcrystals in directionally solidified Al–3 at.% Mn alloy

Published online by Cambridge University Press:  09 June 2014

Huijun Kang ,
Tongmin Wang ,
Xinzhong Li ,
Yanqing Su ,
Jingjie Guo  and
Hengzhi Fu
Huijun Kang
Affiliation:
Department of Materials Engineering, School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China
Tongmin Wang*
Affiliation:
Department of Materials Engineering, School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China
Xinzhong Li
Affiliation:
Department of Materials Engineering, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Yanqing Su
Affiliation:
Department of Materials Engineering, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Jingjie Guo
Affiliation:
Department of Materials Engineering, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Hengzhi Fu
Affiliation:
Department of Materials Engineering, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
*
a)Address all correspondence to this author. e-mail: tmwang@dlut.edu.cn
Get access

Abstract

A comprehensive understanding of the growth pattern of intermetallic compounds (IMCs) during solidification is critical to both the crystal-growth theory and its property optimization. In this article, growth pattern and three-dimensional (3D) morphology of primary Al6Mn IMC were investigated in directionally solidified Al–3 at.% Mn alloy at a wide range of growth rates. A transition from faceted (<60 μm/s) to nonfaceted growth (>100 μm/s) was observed with increasing growth rates. Correspondingly, 3D morphologies of primary Al6Mn change from a solid polyhedron to a hollow structure, and then to a dendrite. This kind of change is associated with the competitive growths of different crystal planes determined by the crystallographic anisotropy and growth kinetics of Al6Mn. A growth model based on atomic cluster attachment is proposed to reveal the growth transition, and a growth-rate ratio between different crystal planes is used to appropriately reveal the formation mechanism of different morphologies at low rates.

Keywords

aluminum alloyintermetallics compoundsdirectional solidificationgrowth pattern3D morphology
Type
Articles
Information
Journal of Materials Research , Volume 29 , Issue 11 , 14 June 2014 , pp. 1256 - 1263
Copyright
Copyright © Materials Research Society 2014 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Stoloff, N.S., Liu, C.T., and Deevi, S.C.: Emerging applications of intermetallics. Intermetallics 8, 1313 (2000).CrossRefGoogle Scholar
Contieri, R.J., Lopes, E.S.N., Taquire de La Cruz, M., Costa, A.M., Afonso, C.R.M., and Caram, R.: Microstructure of directionally solidified Ti–Fe eutectic alloy with low interstitial and high mechanical strength. J. Cryst. Growth 333, 40 (2011).CrossRefGoogle Scholar
Li, L., Zhao, Z., Zuo, Y., Zhu, Q., and Cui, J.: Effect of a high magnetic field on the morphological and crystallographic features of primary Al6Mn phase formed during solidification process. J. Mater. Res. 28, 1567 (2013).Google Scholar
Kaya, H., Engin, S., Böyük, U., Çadırlı, E., and Maraşl&imath, N.: Unidirectional solidification of Zn-rich Zn–Cu hypoperitectic alloy. J. Mater. Res. 24, 3422 (2009).CrossRefGoogle Scholar
Bewlay, B.P. and Jackson, M.R.: The effect of Hf and Ti additions on microstructure and properties of Cr2Nb–Nb in situ composites. J. Mater. Res. 11, 1917 (1996).Google Scholar
Wang, S., Luo, L., Su, Y., Guo, J., and Fu, H.: A lateral remelting phenomenon of the primary phase below the temperature of peritectic reaction in directionally solidified Cu–Ge alloys. J. Mater. Res. 28, 3261 (2013).Google Scholar
Li, C., Wu, Y.Y., Li, H., and Liu, X.F.: Morphological evolution and growth mechanism of primary Mg2Si phase in Al–Mg2Si alloys. Acta Mater. 59, 1058 (2011).CrossRefGoogle Scholar
Kang, H., Li, X., Su, Y., Liu, D., Guo, J., and Fu, H.: 3-D morphology and growth mechanism of primary Al6Mn intermetallic compound in directionally solidified Al-3at.% Mn alloy. Intermetallics 23, 32 (2012).Google Scholar
Kurz, W. and Fisher, D.J.: Fundamentals of Solidification (Trans Tech Publications Ltd., Switzerland, 1998); pp. 21–41.Google Scholar
Kang, H., Li, X., Wang, T., Liu, D., Su, Y., Hu, Z., Guo, J., and Fu, H.: Crystal–quasicrystal transition depending on cooling rates in directionally solidified Al–3Mn–7Be (at.%) alloy. Intermetallics 44, 101 (2014).Google Scholar
Hyde, K.B., Norman, A.F., and Prangnell, P.B.: The effect of cooling rate on the morphology of primary Al3Sc intermetallic particles in Al–Sc alloys. Acta Mater. 49, 1327 (2001).Google Scholar
Wang, R.Y., Lu, W.H., and Hogan, L.M.: Growth morphology of primary silicon in cast Al–Si alloys and the mechanism of concentric growth. J. Cryst. Growth 207, 43 (1999).Google Scholar
Chen, Y. and Wang, H.M.: Growth morphologies and mechanisms of non-equilibrium solidified MC carbide. J. Mater. Res. 21, 375 (2006).Google Scholar
Deppisch, C., Liu, G., Hall, A., Xu, Y., Zangvil, A., Shang, J.K., and Economy, J.: The crystallization and growth of AlB2 single crystal flakes in aluminum. J. Mater. Res. 13, 3485 (1998).CrossRefGoogle Scholar
Fu, J. and Yang, Y.: Crystallography and morphology of a lathy ferrite in Fe–Cr–Ni alloys during directional solidification. J. Mater. Res. 28, 2040 (2013).CrossRefGoogle Scholar
Jansson, Å.: A thermodynamic evaluation of the Al–Mn system. Metall. Mater. Trans. A 23, 2953 (1992).Google Scholar
Liu, D., Li, X., Su, Y., Luo, L., Guo, J., and Fu, H.: Solute redistribution during planar growth of intermetallic compound with nil solubility. Intermetallics 26, 131 (2012).Google Scholar
Yamamoto, K. and Matsuo, Y.: X-ray study of the electron density distribution for Al6Mn. J. Phys.: Condens. Matter 12, 2359 (2000).Google Scholar
Nie, J., Wu, Y., Li, P., Li, H., and Liu, X.: Morphological evolution of TiC from octahedron to cube induced by elemental nickel. CrystEngComm 14, 2213 (2012).Google Scholar
Kenneth, G.L.: The physics of snow crystals. Rep. Prog. Phys. 68, 855 (2005).Google Scholar
Li, S.M., Quan, Q.R., Li, X.L., and Fu, H.Z.: Increasing the growth velocity of coupled eutectics in directional solidification of off-eutectic alloys. J. Cryst. Growth 314, 279 (2011).Google Scholar
Dobrushin, R.L., Kotecý, R., and Shlosman, S.: Wulff construction: A Global shape from Local Interaction (American Mathematical Society, Providence, RI, 1992); pp. 1–20.Google Scholar
Sekerka, R.F.: Theory of crystal growth morphology. In Crystal Growth – From Fundamentals to Technology, Müller, G., Métois, J.J., and Rudolph, P. eds.; Elsevier Science B.V., Amsterdam, Netherlands, 2004; pp. 55–93.CrossRefGoogle Scholar
Waku, Y., Nakagawa, N., Wakamoto, T., Ohtsubo, H., Shimizu, K., and Kohtoku, Y.: A ductile ceramic eutectic composite with high strength at 1,873 K. Nature 389, 49 (1997).Google Scholar
Su, H.J., Zhang, J., Liu, L., Eckert, J., and Fu, H.Z.: Rapid growth and formation mechanism of ultrafine structural oxide eutectic ceramics by laser direct forming. Appl. Phys. Lett. 99, 221913 (2011).Google Scholar
Wang, Z.L.: Transmission electron microscopy of shape-controlled nanocrystals and their assemblies. J. Phys. Chem. B 104, 1153 (2000).Google Scholar
Jin, S., Shen, P., Zou, B., and Jiang, Q.: Morphology evolution of TiCx grains during SHS in an Al–Ti–C system. Cryst. Growth Des. 9, 646 (2009).Google Scholar
Bögels, G., Buijnsters, J.G., Verhaegen, S.A.C., Meekes, H., Bennema, P., and Bollen, D.: Morphology and growth mechanism of multiply twinned AgBr and AgCl needle crystals. J. Cryst. Growth 203, 554 (1999).Google Scholar
Xu, C.L., Wang, H.Y., Liu, C., and Jiang, Q.C.: Growth of octahedral primary silicon in cast hypereutectic Al–Si alloys. J. Cryst. Growth 291, 540 (2006).Google Scholar
Cahn, J.W., Hillig, W.B., and Sears, G.W.: The molecular mechanism of solidification. Acta Metall. 12, 1421 (1964).Google Scholar
Broughton, J.Q., Gilmer, G.H., and Jackson, K.A.: Crystallization rates of a Lennard-Jones liquid. Phys. Rev. Lett. 49, 1496 (1982).CrossRefGoogle Scholar