کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1450341 988731 2006 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of a high axial magnetic field on the microstructure in a directionally solidified Al–Al2Cu eutectic alloy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Effect of a high axial magnetic field on the microstructure in a directionally solidified Al–Al2Cu eutectic alloy
چکیده انگلیسی

The effect of a high axial magnetic field (up to 12 T) on the microstructure in a directionally solidified Al–Al2Cu eutectic alloy has been investigated experimentally. The results show that a high magnetic field decreases the eutectic spacing and degenerates the lamellar structure into a wavy one at a low growth speed. X-ray diffraction, selected-area electron diffraction and high-resolution electron microscopy analyses indicate that the field changes the preferred orientation. The Al2Cu crystal is oriented with the 〈0 0 1〉-crystal direction along the solidification direction (i.e., the magnetic field direction). At a pulling velocity of 0.5 μm/s, the magnetic field (B ⩾ 4T) is responsible for the segregation; which consists of Al striations on the longitudinal section and Al-rich zones on the transverse section. The effects of the field may be attributed to the orientation of the Al2Cu and the Al crystals and the decrease of the diffusion coefficient caused by the magnetic field.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 54, Issue 20, December 2006, Pages 5349–5360
نویسندگان
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