Abnormal Grain Growth Induced by Boundary Segregation of Solute Atoms

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Abnormal grain growth (AGG) proceeds in case that normal grain growth is inhibited. It has long been known that the inhibition involves finely dispersed particles and/or the development of specific textures. There is another strong obstacle against the grain boundary (GB) motion; the solute atoms can reduce their energy by moving from the bulk into a GB. Resultant interaction between the solute atoms and a GB makes the GB motion more difficult. However the role of the GB segregation effect on AGG has not been clarified. In this study we simulate the 2D and 3D grain growth accompanying boundary segregation of solute atoms by using a phase-field model. It is shown that the segregation plays an important role on the occurrence of AGG. The boundary-segregation-induced AGG can take place when the average driving force of grain growth approaches a critical condition for pinning-depinning transition in solute-drag atmosphere.

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Materials Science Forum (Volumes 558-559)

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1093-1099

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October 2007

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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[1] F.J. Humphreys and M. Hatherly: Recrystallization and Related Annealing Phenomena (Pergamon Press, Oxford 1995).

Google Scholar

[2] P. R. Rios: Acta mater. Vol. 45 (1997), p.1785.

Google Scholar

[3] J. Harase, R. Shimizu and D.J. Dingley: Acta Metall. Vol. 39 (1991), p.763.

Google Scholar

[4] P. Lin, G. Palumbo, J. Harase and K.T. Aust: Acta. Metall. Vol. 44 (1996), p.4677.

Google Scholar

[5] Y. Hayakawa and J.A. Szpunar: Acta Metall. Vol. 45 (1997), p.1285.

Google Scholar

[6] N. Rajmohan, J.A. Szpunar and Y. Hayakawa: Acta Metall. Vol. 47 (1999), p.2999.

Google Scholar

[7] M. Militzer1, P. Freundlich and D. Bizzotto: Mater. Sci. Forum Vol. 467-470 (2004), p.1339.

Google Scholar

[8] B. Faerber, E. Cadel, A. Menand, G. Schmitz and R. Kirchheim: Acta Mater. Vol. 48 (2000) p.789.

Google Scholar

[9] P. Choi, M. da Silva, U. Klement, T. Al-Kassab and R. Kirchheim: Acta Mater. Vol. 53 (2005), p.4473.

Google Scholar

[10] U. Klement, U. Erb, A.M. Sherik and K.T. Aust: Mater. Sci. Eng. Vol. A203 (1995), p.177.

Google Scholar

[11] J.W. Cahn: Acta metall. Vol. 10 (1962) p.789.

Google Scholar

[12] K, Lucke, and H.P. Stuwe: Acta metall. Vol. 19 (1971), p.1087.

Google Scholar

[13] M. Furtkamp, G. Gottstein, D. A. Molodovi, V. N. Semenov and L. S. Shvindlerman: Acta Mater. Vol. 46 (1998) p.4103.

Google Scholar

[14] S. Tsurekawa and H. Nakashima: Mater. Sci. Forum Vol. 294-296 (1999), p.629.

Google Scholar

[15] P. -R. Cha, S.G. Kim, D. -H. Yeon and J. -K. Yoon: Acta Mater. Vol. 50 (2002), p.3817.

Google Scholar

[16] S.G. Kim, W.T. Kim and Y.B. Park, to be submitted.

Google Scholar

[17] I. Steinbach and F. Pezzolla, Physica D Vol. 134 (1999) p.385.

Google Scholar

[18] S.G. Kima, W.T. Kim, T. Suzuki and M. Ode: J. Crystal Growth Vol. 261 (2004), p.135.

Google Scholar

[19] S.G. Kim, D.I. Kim, W.T. Kim and Y.B. Park, Phys. Rev. E 74, (2006) p.061606.

Google Scholar