Cube{100}<001> Grains Nucleation during Annealing of S-Oriented Aluminum Single Crystal

Abstract:

The crystallographic aspects of nucleation of cube grains during annealing have been analyzed in (234)[20-28 11] - oriented aluminum single crystal. The samples were plane strain compressed in a channel-die up to logarithmic strains of 0.5 (40%) and then annealed to develop initial and final stages of primary recrystallization. The deformed and annealed samples were analyzed using scanning electron microscopy equipped with EBSD facility. Local orientation measurements reveled that significant part of the sample deforms homogeneously with only small deviation from the initial crystal orientation. The heterogeneities were thin bands of localized strain in which the crystal lattice rotate towards another variant of S orientation. After annealing the orientations identified inside deformed/recovered areas were similar to that observed in the sample just after deformation. The crystal lattice of recrystallized grains exhibit a well-defined clockwise and anticlockwise rotations around the axes grouped near all normals of the {111} planes of the deformed/recovered state. The cube grains were observed in both homogeneously and heterogeneously deformed areas despite the cube-oriented nuclei surrounded by high angle boundary were not present in the as-deformed structure.

• Periodical: Materials Science Forum (Volume 941)
• Pages: 1511-1516
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.941.1511
• Online since: December 2018
• Authors: Magdalena M. Miszczyk, Henryk Paul*
• Keywords: Aluminum Single Crystal, Cube Orientation, Grain Growth, Nucleation Growth, SEM/EBSD

References

[1] R.D. Doherty, D.A. Hughes, F.J. Humphreys, J.J. Jonas, D. Juul Jensen, M.E. Kassner, W.E. King, T.R. McNelly, H.J. McQueen, A.D. Rollett, Current issues in recrystallization: a review, Mater. Sci. Engn., A 238, 219 (1997).

DOI: 10.1016/s0921-5093(97)00424-3

[2] O. Engler, M-Y. Huh, Evolution of the cube texture in high purity aluminium capacitor foils by continuous recrystallization and subsequent grain growth, Mater. Sci. Engn. A271 (1999) 371-381.

DOI: 10.1016/s0921-5093(99)00254-3

[3] H.E. Vatne T. Furu, E. Nes, Nucleation of recrystallized grains from cube bands in hot deformed commercial purity aluminium, Mater. Sci. Techn. 12 (1996) 201-210.

DOI: 10.1179/mst.1996.12.3.201

[4] M. Miszczyk, H. Paul, J.H. Driver, P. Drzymała, Recrystallization nucleation in stable aluminium-base single crystals: Crystallography and mechanisms, Acta Mater., 125 (2017) 109-124.

DOI: 10.1016/j.actamat.2016.11.054

[5] M.M. Miszczyk, H. Paul, Cube texture formation during the early stages of recrystallization of Al-1%wt.Mn and AA1050 aluminium alloys, IOP Conf. Series: Mater. Sci. and Engn. 89 (2015) 383-391.

DOI: 10.1088/1757-899x/89/1/012036

[6] M.M. Miszczyk, H. Paul, J.H. Driver, J. Poplewska, The influence of deformation texture on nucleation and growth of cube grains during primary recrystallization of AA1050 alloy, Acta Materialia 129 (2017) 378-387.

DOI: 10.1016/j.actamat.2017.03.004

[7] A.A. Ridha, W.B. Hutchinson: Recrystallization mechanisms and the origin of cube texture in copper, Acta Metall., Vol. 30, (1984), 1929-1939.

DOI: 10.1016/0001-6160(82)90033-5

[8] B.J. Duggan, K. Lücke, G.D. Köhlhoff, C.S. Lee, On the origin of cube texture in copper, Acta Metall. Mater., 41 (1993) 1921-1927.

DOI: 10.1016/0956-7151(93)90211-a

[9] I. Samajdar, R. Doherty, Role of S{123}<634> orientations in the preferred nucleation of cube grains in recrystallization of fcc metals, Scripta Mater., 32 (1996) 845-850.

DOI: 10.1016/0956-716x(95)93212-m

[10] T. Kamijo, S. Katoka, H. Inagaki, Nucleation and growth of cube oriented recrystallized grains in aluminium single crystal of an S-orientation, Acta metal. Mater., 41 (1993) 1713-1720.

DOI: 10.1016/0956-7151(93)90190-4