Features of Highly Twinned Microstructures Produced by GBE in FCC Materials

Abstract:

The proportion of low ΣCSL boundaries of single phase brass, Ni based Alloy 690, 304 stainless steel and Pb alloy were enhanced to about 70% (according to Palumbo–Aust criterion) which mainly were Σ3n (n = 1, 2, 3…) types by small amount of deformation and recrystallization annealing. All the resulting microstructures were constituted of large size grain-cluster, in which all the orientation relationships between any two grains (no matter adjacent or not) could be described by Σ3n misorientations according to twin chain analyzing. Twin relationships up to 8th generation (Σ38) were found in one of such clusters. The outer boundaries of grain-clusters were crystallographically random with the adjacent clusters. In the case of high proportion of low ΣCSL boundaries, the connectivity of random boundary network was not fragmented obviously when the Palumbo–Aust criterion was used, whereas substantially interrupted when the Brandon criterion was applied.

• Periodical: Materials Science Forum (Volumes 638-642)
• Pages: 2870-2875
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.638-642.2870
• Online since: January 2010
• Authors: Shuang Xia, Bang Xin Zhou, Wen Jue Chen, Xin Luo, Hui Li
• Keywords: Grain Boundary Network, Grain-Cluster Microstructure, Multiple Twinning

References

[1] T. Watanabe: Res. Mech. Vol. 11 (1984), p.47.

[2] V. Randle: Acta Mater. Vol. 52 (2004), p.4067.

[3] M.L. Kronberg and F.H. Wilson: Trans. AIME Vol. 185 (1949), p.501.

[4] A. Berger, P.J. Wilbrandt, F. Ernst, U. Klement, and P. Haasen: Prog. Mater. Sci. Vol. 32 (1988), p.1.

[5] G. Gottstein: Acta Metall. Vol. 32 (1984), p.1117.

[6] E. M. Lehockey, D. Limoges, G. Palumbo, J. Sklarchuk, K. Tomantschger and A. Vincze: J. Power Sources Vol. 78 (1999), p.79.

DOI: 10.1016/s0378-7753(99)00015-4

[7] S. Xia, B.X. Zhou and W.J. Chen: J. Mater. Sci. Vol. 43 (2008), p.2990.

[8] Randle V, Davies H. Met Mater Trans A Vol. 33 (2002), p.1853.

[9] M. Shimada, H. Kokawa and Z. J. Wang: Acta Mater. Vol. 50 (2002), p.2331.

[10] G. Palumbo and K.T. Aust: Acta. Metall. Mater. Vol. 38 (1990), p.2343.

[11] V.Y. Gertsman and C.H. Henager: Interface Sci. Vol. 11 (2003), p.403.

[12] S. Xia, B.X. Zhou, W.J. Chen and W.G. Wang: Scripta mater. Vol. 54 (2006), p. (2019).

[13] V. Randle: J. Mater. Sci. Vol. 41 (2006), p.653.

[14] P. Haasen: Metall. Trans. B Vol. 24B (1993), p.225.

[15] P.J. Wilbrandt: Phys. State. Solidi. Vol. 61 (1980), p.411.

[16] D. G. Brandon, Acta Metall. Vol. 14 (1966), p.1479.