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Ex Situ Observation of Microstructure Evolution During Abnormal Grain Growth in Aluminum Alloy

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Abstract

The sequential microstructural evolution of abnormal grain growth in the aluminum alloy was traced by ex situ observation using electron-backscattered diffraction during secondary recrystallization. Near the growth front of abnormally growing grains, many three- or four-sided grains with a negative curvature, which had the same orientation as abnormally growing grains, were penetrating the surface, indicating that abnormal grain growth occurs dominantly by repeated events of triple-junction wetting. Also, abnormally growing grains were shown exclusively to have sub-boundaries.

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Acknowledgment

This work was financially supported by POSCO Technical Research Laboratories.

Author information

Correspondence to Nong-Moon Hwang.

Additional information

Manuscript submitted January 9, 2012.

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Park, H., Kang, H., Park, C. et al. Ex Situ Observation of Microstructure Evolution During Abnormal Grain Growth in Aluminum Alloy. Metall and Mat Trans A 43, 5218–5223 (2012). https://doi.org/10.1007/s11661-012-1334-y

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Keywords

  • Triple Junction
  • Growth Front
  • Coincidence Site Lattice
  • Cube Texture
  • Secondary Recrystallization