Elsevier

Scripta Materialia

Volume 116, 15 April 2016, Pages 71-75
Scripta Materialia

Synchrotron X-ray microdiffraction of Fe–3 wt%Si steel focusing on sub-boundaries within Goss grains

https://doi.org/10.1016/j.scriptamat.2016.01.026Get rights and content

Abstract

The microstructure evolved after the initial stage of abnormal grain growth (AGG) in Fe–3 wt%Si steel was examined using synchrotron X-ray microdiffraction to identify the sub-boundaries, which had been suggested to induce the selective AGG of Goss-oriented grains. The splitting of Laue diffraction peaks caused by sub-boundaries was observed only in Goss grains and not in matrix grains in the entire samples. The sub-boundaries were measured to have very low misorientation angles in the range of 0.1–0.6°. The characteristics and morphologies of sub-boundaries in Goss grains were analyzed based on the splitting directions and positions of Laue diffraction peaks.

References (35)

  • B. Sarrail et al.

    Eng. Fail. Anal.

    (2007)
  • H.C. Kim et al.

    Scr. Mater.

    (2007)
  • N. Rajmohan et al.

    Acta Mater.

    (1999)
  • Y. Yoshitomi et al.

    Acta Metall. Mater.

    (1994)
  • H. Homma et al.

    Acta Mater.

    (2003)
  • A.L. Etter et al.

    Scr. Mater.

    (2002)
  • A. Morawiec

    Scr. Mater.

    (2000)
  • K.J. Ko et al.

    Acta Mater.

    (2010)
  • K.J. Ko et al.

    Acta Mater.

    (2009)
  • N.M. Hwang et al.

    Scr. Mater.

    (2001)
  • D. Raabe et al.

    Acta Mater.

    (2002)
  • H.K. Park et al.

    Scr. Mater.

    (2010)
  • G.E. Ice et al.
  • D. Hull et al.
  • F.J. Humphreys et al.
  • D. Dorner et al.

    Acta Mater.

    (2007)
  • R. Messina et al.

    J. Appl. Phys.

    (1998)
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      Therefore, the orientation of this synchrotron XMD IPF map coincides with the EBSD IPF map of the box of the number 1 in Fig. 2. The diffraction beams are known to split in the sub-boundary region [23,24,32]. We therefore examined all diffraction beams in the scanned area of Fig. 3a to determine whether beam splitting occurred.

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