Observation of Growth Front on the Initial Stage of Goss Abnormally-Growing Grain in Fe-3%Si Steel

Kyung Jun Ko; Jong Tae Park; Chan Hee Han

doi:10.4028/www.scientific.net/MSF.753.307

Paper Titles

EBSD Investigation of Cold Rolled and Recrystallized Titanium
p.289

Recrystallization Texture of Heavily Cold Rolled Polycrystalline Nickel Sheets with and without Strong Starting Cube Texture
p.293

Recrystallisation of Magnesium Alloys Containing Rare-Earth Elements
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Recrystallization and Grain Growth due to Annealing of an Ultrafine-Grained Al Alloy
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Observation of Growth Front on the Initial Stage of Goss Abnormally-Growing Grain in Fe-3%Si Steel
p.307

Development of Boundary Misorientations During Grain Growth in Silicon Steels
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Abnormal Grain Growth in Nanocrystalline Materials
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Strain Induced Abnormal Grain Growth in Nickel Base Superalloys
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Grain Coarsening Characteristics of Modern Nb Microalloyed Steels
p.325

HomeMaterials Science ForumMaterials Science Forum Vol. 753Observation of Growth Front on the Initial Stage...

Observation of Growth Front on the Initial Stage of Goss Abnormally-Growing Grain in Fe-3%Si Steel

Abstract:

During abnormal grain growth, a few Goss grains grow exclusively fast and consume the matrix grains. The Goss abnormally-growing grain (AGG) has peculiar features which are irregular grain boundaries and very high frequency of peninsular grains nearby the growth front of AGG and island grains trapped inside AGG. These features might provide a clue for clarifying the mechanism of Goss AGG. The experimentally-observed microstructural feature and grain boundary characterization of Goss were approached by the solid-state wetting mechanism. In this study, observing the three-dimensional wetting morphology in serial section images of Goss AGG by EBSD, we report some direct microstrucrual evidence supporting solid-state wetting mechanism for Goss AGG. The solid-state wetting mechanism for the evolution of the Goss AGG in Fe-3%Si steel explains the microstructural features evolved during secondary recrystallization, which cannot be approached by the conventional theories based on the grain boundary mobility.