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Crystallographic effect of a high magnetic field on a solidified hypoeutectic Zn–Al alloy
Author(s) -
Li Lei,
Li Zongbin,
Zhang Yudong,
Esling Claude,
Liu Haitao,
Zhao Zhihao,
Zhu Qingfeng,
Zuo Yubo,
Cui Jianzhong
Publication year - 2014
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/s1600576714001939
Subject(s) - eutectic system , nucleation , materials science , alloy , phase (matter) , crystallography , magnetic field , magnetocrystalline anisotropy , perpendicular , condensed matter physics , lamellar structure , field (mathematics) , orientation (vector space) , anisotropy , diamagnetism , metallurgy , magnetic anisotropy , chemistry , thermodynamics , geometry , physics , optics , magnetization , organic chemistry , quantum mechanics , mathematics , pure mathematics
Hypoeutectic Zn–4.45 wt% Al solidified under a high magnetic field was investigated crystallographically. With the field, the primary zinc‐rich β phase is distributed homogeneously and orients with the c axis perpendicular to the magnetic field direction. These results are attributed to the magnetic viscosity resistance force and the magnetocrystalline anisotropy of zinc, respectively. The orientation modification also leads to a preferential alignment of the flat‐shaped primary β dendrites. Furthermore, with the field, the eutectic β phase shows an orientation character similar to that of the primary β phase. This arises from its continuous growth with the primary β phase. In addition, a specific crystallographic orientation relationship ({0001} β ||{111} α , 〈110〉 β ||〈110〉 α ) exists in some of the eutectics (between the eutectic zinc‐rich β and aluminium‐rich α phases). However, this orientation relationship is related to the distribution of primary β dendrites, which originates from the independent nucleation of the pseudo‐primary α phase attached to the primary β dendrites.