Nucleation of recrystallization observed in situ in the bulk of a deformed metal

Abstract Nucleation of recrystallization is studied in situ in the bulk by three-dimensional X-ray diffraction. Copper samples cold rolled 20% are investigated. The crystallographic orientations near triple junction lines are characterized before, during and after annealing. Three nuclei are identified and it is shown that two nuclei are twin related to their parent grain and one nucleus has an orientation, which is neither present in the deformed parent grains nor first order twin related to any of them. Data on the nucleation kinetics is also presented.

[1]  N. Hansen,et al.  Large strain deformation structures in aluminium crystals with rolling texture orientations , 1994 .

[2]  H. Poulsen,et al.  In Situ Measurement of Grain Rotation During Deformation of Polycrystals , 2001, Science.

[3]  Henning Friis Poulsen,et al.  Three-Dimensional X-Ray Diffraction Microscopy , 2004 .

[4]  A. P. Hammersley,et al.  Two-dimensional detector software: From real detector to idealised image or two-theta scan , 1996 .

[5]  G. Winther.  Slip patterns and preferred dislocation boundary planes , 2003 .

[6]  3D-characterisation of microstructure evolution during annealing of a deformed aluminum single crystal , 2003 .

[7]  J. E. Bailey,et al.  The recrystallization process in some polycrystalline metals , 1962, Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences.

[8]  N. Hansen,et al.  New discoveries in deformed metals , 2001 .

[9]  S. Zwaag,et al.  Grain Nucleation and Growth During Phase Transformations , 2002, Science.

[10]  F. Inoko,et al.  Recrystallization of aluminum bicrystals with a common 7π/45 radian {111} twist grain boundary , 1987 .

[11]  F. J. Humphreys,et al.  Recrystallization and Related Annealing Phenomena , 1995 .

[12]  S. Schmidt,et al.  Watching the Growth of Bulk Grains During Recrystallization of Deformed Metals , 2004, Science.

[13]  R. Doherty,et al.  Role of S[(123)〈634〉] orientations in the preferred nucleation of cube grains in recrystallization of FCC metals , 1995 .

[14]  C. Maurice,et al.  Crystallographic aspects of the early stages of recrystallisation in brass-type shear bands , 2002 .

[15]  Henning Friis Poulsen,et al.  Tracking: a method for structural characterization of grains in powders or polycrystals , 2001 .

[16]  D. J. Jensen,et al.  Orientation relationships between recrystallization nuclei at triple junctions and deformed structures , 2003 .

[17]  Lahsen Assoufid,et al.  Elliptical x-ray microprobe mirrors by differential deposition , 2000 .

[18]  M. Koiwa,et al.  Deformation and recrystallization textures of copper single crystals and bicrystals , 1992 .

[19]  Keizo Kashihara,et al.  Crystal orientations before and after annealing in an Al single crystal strained in tension , 2003 .

[20]  D. Juul Jensen,et al.  The Orientations of Nuclei at Triple Junctions in Deformed Columnar Grain Ni , 2005 .

[21]  N. Hansen,et al.  Recrystallisation of channel die deformed single crystals of typical rolling orientations , 2001 .