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EBSD study of the morphology and orientation of the primary and eutectic phases in Al–Cu alloys during solidification under a strong magnetic field
Author(s) -
Li Xi,
Fautrelle Yves,
Moreau Rene,
Ren Zhongming
Publication year - 2016
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s1600576715021731
Subject(s) - materials science , directional solidification , electron backscatter diffraction , eutectic system , magnetic field , dendrite (mathematics) , condensed matter physics , anisotropy , thermoelectric effect , rotating magnetic field , crystal (programming language) , metallurgy , crystallography , alloy , microstructure , optics , thermodynamics , geometry , chemistry , physics , mathematics , quantum mechanics , computer science , programming language
The effect of a strong magnetic field on the morphology and orientation of the Al 2 Cu dendrite and Al–Al 2 Cu eutectic in Al–Cu alloys was studied using electron backscatter diffraction (EBSD) technology. The experimental results revealed that the applied magnetic field modified the morphology and orientation of both the Al 2 Cu dendrite and the Al–Al 2 Cu eutectic significantly. The magnetic field caused a break in the Al 2 Cu dendrite and the degeneration of Al–Al 2 Cu eutectic lamellae during directional solidification. It was also found that the magnetic field caused the formation of dislocations in the α‐Al and Al 2 Cu phases during directional solidification. In addition, the primary and eutectic Al 2 Cu phases were oriented with the ⟨001⟩ crystal direction along the magnetic field during volume solidification. Both α‐Al and Al 2 Cu phases were oriented with the ⟨001⟩ crystal direction along the solidification direction during directional solidification under an axial magnetic field. The above phenomena were enhanced as the magnetic field increased; this could be attributed to magnetic crystalline anisotropy of the material and thermoelectric magnetic effects. This study may offer experimental evidence that shows that thermoelectric magnetic effects significantly influence dendrite arrays during directional solidification in a magnetic field.